O SEA | seafood for thought

4.9

840 Reviews

$30 and under

Seafood

Make a booking

2 people

14 Mar 2025

19:00

Booked 21 times today

Experiences are available.

Neighbourhood gem
Great for fine wines
Healthy

O SEA — a seafood restaurant of time and place in the historic Plaza district of Old Towne Orange, recently recognized by the Los Angeles Times as the Best Seafood Restaurant in Orange County and by Wine Spectator Magazine with an Award of Excellence. Something fun, something different, something fresh — O SEA is where seafood is headed. Think salmon ceviche in coconut leche de tigre, tuna poke in gochujang dressing, crispy oaxacan hot shrimp, west coast oysters on the half with thai red curry and tajin’d lime.

Responsibly-procured, best-in-class products, served consistently and at a value, with deeply craveable and seasonal flavors — welcome to O SEA.

We can’t wait to serve you.

Order delivery or takeout

Additional information

Dining style
Casual Elegant
Price
$30 and under
Cuisines
Seafood, Wine Bar, Breakfast
Hours of Operation
Lunch Tue–Fri 11:30–16:00 Sat, Sun 10:00–15:00 Brunch Sat, Sun 10:00–15:00 Happy Hour Tue–Fri 14:00–17:00 Dinner Tue–Thu 16:00–20:30 Fri 16:00–21:00 Sat 15:00–21:00 Sun 15:00–20:30
Phone number
(714) 363-3309
Website
https://eatosea.com/
Payment Options
AMEX, Discover, Mastercard, Visa
Dress code
Casual Dress
Executive Chef
German Mejia

Location
109 S Glassell St, Orange, CA 92866-1421
Area
Orange
Cross Street
Chapman Ave and S Glassell Street
Parking details
Public Lot
Additional
Beer, BYO Wine, Gender Neutral Restroom, Gluten-free Options, Happy Hour, Non-Smoking, Patio/Outdoor Dining, Takeaway, Vegan, Wheelchair Access, Wine

Gift card

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Experiences

Weekend Brunch at O SEA!
Multiple dates available
You asked...we listened! BRUNCH has arrived at O SEA! Join us every Saturday and Sunday from 11am-3pm for a collection of Orange's favorite breakfast snackies. Think Brioche French Toast 'Tres Leches', Sweet & Smoky Chilaquiles with Salsa Macha, Breakfast BLT Greens, and Cinnamon Buns with Pistachio, Blood Orange, and Green Cardamom. Bevies? The best Mimosa in Old Towne Orange, maybe a Mango Michelada, maybe an Iced Lavender Latte. Whatever floats your boat. Brunch not quite your thing? We serve our regular Lunch menu from 11am-3pm as well. We look forward to serving you!
Happy Hour at O SEA - Weekdays from 2-5pm
Multiple dates available
Orange's best Happy Hour is back at O SEA - join us every weekday afternoon (Tuesday-Friday) from 2-5pm for 50% off our entire bottled wine list, $1.45 oysters, and a selection of menu favorites - spicy tuna on crispy rice, salmon ceviche, and a lil cheeseburger - just to name a few. We look forward to serving you!
Rhys & Centennial Mountain Vineyards - Wine Dinner
US$195.00 per person
Prepaid
3 Apr 2025 only
18:00
Our first winemaker dinner of 2025 has arrived! This Thursday, April 3rd, please join us in welcoming Director of Winemaking Jeff Brinkman of Rhys & Centennial Mountain Vineyards as we showcase 7 distinct wines and 7 distinct terroirs in California's Santa Cruz Mountains, Sonoma County, and Mendocino County. For over twenty years, Rhys Vineyards has rightfully carved out its place among California's blue chip wineries, producing single-vineyard Pinot Noirs & Chardonnays of place and finesse. Their sister winery - Centennial Mountain Vineyards - is the state's first winery to produce the signature varietals of Sicily, like Carricante and Nerello Mascalese. Chef German is thrilled to serve five distinct Cal-Sicilian courses to pair with these spectacular wines, paying respect to the wineries' connections to Sicily and Mediterranean cuisine.

Popular dishes

GRILLED AVOCADO with PICKLED ONIONS US$8.95
spicy thai vinaigrette, crema, pepitas — grilled rustic bread
BURRATA CHEESE with HONEYNUT JAM | VUS$14.95
brown butter, crispy sage — grilled rustic bread
WILD TAHITIAN ALBACORE TUNA POKE | DFUS$14.95
citrus-white miso dressing, green onions, togarashi — taro chips
FARMED ATLANTIC SALMON CEVICHE | DFUS$14.95
coconut leche de tigre, avocado, chili oil — taro chips
CRISPY CALAMARI US$19.95
togarashi-fried— white miso tartar sauce, oaxacan chili oil
WILD MEXICAN WHITE SHRIMP AGUACHILE 'NEGRO' | DF US$14.95
squid ink, sunomono pickles, radish, fresno chili — taro chips
WILD MARYLAND JUMBO LUMP CRAB CAKE US$19.95
spicy mayo, thai slaw, garlic chips
HAND ROLL with ALBACORE TUNA or CRISPY SALMON SKIN ‘CHICHARRON’ ea | DFUS$8.95
nori rice, sunomono pickles, spicy mayo, avocado, furikake — citrus ponzu
WILD SPANISH OCTOPUS ‘A LA PLANCHA’ | GFUS$19.95
guajillo sauce, curtido slaw, cotija cheese, grilled lime
SPICY WILD TAHITIAN ALBACORE TUNA on CRISPY RICE | DFUS$16.95
avocado, green onion, sweet soy, jalapeño, furikake
O SEA ‘CHOWDAH’ | GF
new england style — with bacon, lemongrass & ginger
- cup US$7.95
- bowl US$13.95

power lunch picks

21.95 TWO COURSES, YOUR CHOICE AVAILABLE TUESDAY– FRIDAY FROM 11:30AM – 4PM

CHOICE OF
GRILLED AVOCADO TUNA POKE SALMON SKIN HAND ROLL
AND THEN
TWO FISH TACOS BITTER HARVEST GREENS

entree salads

ADD A MARKET PROTEIN +14.95

GARDEN SALAD | DF | GFUS$14.95
preserved lemon vinaigrette, tomato, cucumber, radish, avocado, carrots, pickled onions
GREEN GODDESS SALAD | GFUS$16.95
baby kale, bacon, crispy corn nuts, avocado, cucumber, tomato, goat cheese
TIJUANA CAESAR | GFUS$16.95
kale & baby romaine, pepitas, cotija cheese, tajin
BITTER HARVEST GREENS US$16.95
maple vinaigrette, arugula & radicchio, shaved brussels, farro, roasted butternut squash, pickled onions, goat cheese

7oz MARKET PROTEINS

WILD MEXICAN WHITE SHRIMP
WILD TAHITIAN ALBACORE TUNA
FARMED ATLANTIC SALMON
WILD WASHINGTON COD
WILD ECUADORIAN WHITE SEABASS
WILD MEXICAN SWORDFISH
WILD MEXICAN YELLOWTAIL
GRILLED CHICKEN BREAST
SEARED TOFU

entree plates

LEAN & MEAN PLATE | DF | GFUS$24.95
CHOOSE A MARKET PROTEIN nori rice, garden salad, grilled lemon
SUPER TUSCAN PLATE | DFUS$29.95
CHOOSE A MARKET PROTEIN braised tuscan kale, romesco’d potatoes, charred scallion aioli
ROASTED BUTTERNUT SQUASH & GARBANZO TAJINE US$29.95
CHOOSE A MARKET PROTEIN lemon tahini, dukka, cilantro
TWO GRILLED FISH TACOS with RICE & BLACK BEANS | DFUS$19.95
CHOOSE A MARKET PROTEIN pico de gallo, pickled onions, cabbage, spicy mayo, in a mejorado corn or flour tortilla
O SEA BURRITO US$19.95
CHOOSE A MARKET PROTEIN nori rice, black beans, pico de gallo, cabbage, spicy mayo, avocado salsa, in a mejorado flour tortilla

finger foods

STEAMED PEI MUSSELS in THAI GREEN CURRY US$21.95
coconut milk, ginger, kaffir lime — grilled rustic bread
- MAKE ’EM SPICYUS$1.95
- MAKE ’EM MOULES-FRITESUS$4.95
CRISPY OAXACAN HOT SHRIMP US$22.95
guajillo & arbol chili oil, charred scallion aioli — classic fries or garden salad
WILD WASHINGTON COD FISH & CHIPS | DFUS$24.95
white miso tartar sauce — classic fries
DAD’S DOUBLE CHEESEBURGER US$19.95
american cheese, remoulade, pickles — classic fries
WILD TAHITIAN ALBACORE TUNA POKE BOWL US$20.95
nori rice, citrus-white miso dressing, green onions, togarashi — seaweed salad & pickled mushrooms
DAILY CIOPPINO US$38.95
fresh fish, manila clams, PEI mussels & mexican white shrimp in spicy tomato broth — grilled rustic bread

niños

CLASSIC FRIES or GARDEN SALAD

GRILLED FISH | DF | GFUS$17.95
LIL BURRITO | DFUS$14.95
JR CHEESEBURGER US$13.95
GRILLED CHEESE US$12.95

sweets

THAI MILK TEA BLONDIE SUNDAE US$9.95
'greater than the sum of its parts' — vanilla ice cream, thai tea caramel, sea salt
CHOCOLATE BREAD PUDDINGUS$11.95
chocolate chipotle ganache, salsa seca streusel, cinnamon whipped cream
BUTTERMILK PANNA COTTA US$9.95
cranberry-citrus jam, gingerbread biscotti

beverages

NON-ALCOHOLIC

LEMONADE 3.95
ICED TEA US$3.95
DAILY AGUA FRESCA US$3.95
TOPO CHICO bottle US$3.95
MEXICAN COKE bottle US$4.95
DIET COKE bottle US$3.95
SPRITE bottle US$3.95

FRENCH–PRESSED COFFEE OR TEA

THE LOST BEAN COFFEE US$5.95
regular or decaf
STEVEN SMITH TEAMAKER US$5.95
British Brunch Tea, Jasmine Silver Tip Green Tea, Meadow Herbal Tea

ESPRESSO

ESPRESSO SHOTUS$3.95
AMERICANO hot or iced US$4.95
LATTE hot or iced US$4.95
CAPPUCCINO hot or iced US$4.95

CONSUMING RAW OR UNDERCOOKED MEATS, POULTRY, SEAFOOD, SHELLFISH, OR EGGS MAY INCREASE YOUR RISK OF FOOD BORNE ILLNESS

WE CARE FOR THE COMFORT AND SAFETY OF OUR GUESTS WITH DIETARY RESTRICTIONS & PREFERENCES. PLEASE INQUIRE WITH YOUR SERVER REGARDING ANY SPECIAL CONSIDERATIONS IN THE PREPARATION OF YOUR LUNCH OR DINNER

What 840 people are saying

Overall ratings and reviews

Reviews can only be made by diners who have eaten at this restaurant

4.9

4.9 based on recent ratings

4.9Food
4.9Service
4.8Ambience
4.7Value

Noise • Moderate

Loved For

Orange County
Best Overall
Orange County
Best Service
Orange County
Seafood
North Orange County
Best Overall
North Orange County
Best Food
North Orange County
Best Service
North Orange County
Best Ambience
North Orange County
Great for fine wines
North Orange County
Seafood

Review summary

AI-generated from verified diner reviews

O SEA | seafood for thought delights with "outstanding service and food." Its innovative seafood dishes, like "green curry mussels" and "chile verde halibut," are a highlight. The ambience is cozy and inviting, whether enjoying the seasonal menu or the "incredible wine list." A must-visit for seafood lovers.

840 Reviews

OT
OpenTable Diner
Orange County1 review
5.0
Dined 1 day ago
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
We had a great experience and we truly appreciate their staff going the extra mile for our birthday celebration.
Is this helpful?
B
Baksdad
Orange County25 reviews
5.0
Dined 6 days ago
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
We enjoyed ourselves immensely. This was our friends' first time and the food, atmosphere and service were everything we told them about. I'm sure they, as well as us, will be back.
Is this helpful?
LB
LeslieB
Orange County14 reviews
5.0
Dined 6 days ago
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
Everyone at O’Sea is so welcoming and friendly. The food is amazing. One of our favorite places. Mike, Sarah and Elise were wonderful!
Is this helpful?
A
Amy VIP
San Francisco3 reviews
3.0
Dined 7 days ago
1. Overall 3
2. Food 3
3. Service 2
4. Ambience 3
I have been to Osea many times but today was the worst ever. The serving was so slow and my server was not around when we needed her. The food was not good at all especially cioppino was very dissapointing. Overall, everything was not so good when we chose Osea to celebrate my son’s birthday.
Is this helpful?
J
Janine
Los Angeles2 reviews
5.0
Dined 7 days ago
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
First time and it won't be the last. Loved the vibe, nicely decorated, light and comfy. The entire staff was on it and friendly too. Great wine list, loved the music. Finally, the food was very good. They did everything right. Returning soon!
Is this helpful?
J
Jocelyn VIP
Pittsburgh9 reviews
5.0
Dined on 7 March 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
This was my second dinner here. I really appreciate a restaurant that takes excellent care of solo diners (such as myself). They remembered me and welcomed me warmly. I also appreciate a restaurant menu that's well suited to all levels of appetite. Feeling less hungry this time, I opted for a cup of chowder (lovely) and a green goddess side salad. Happy surprise: you can order any of their salads as a side salad. Equally appreciated: interesting and reasonably priced wine by the glass. The service is friendly, thoughtful and adept. I wish I lived closer!
Is this helpful?
J
Jocelyn
Pittsburgh25 reviews
5.0
Dined on 6 March 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
I chose the O Sea Burrito with sea bass and paired it with a glass of orange wine. Both were delicious. The service was excellent.
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KS
KatherineS
Nashville7 reviews
5.0
Dined on 6 March 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
We brought customers to the restaurant and everything was AMAZING - the food and service were everything we expected and more!
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OT
OpenTable Diner
Orange County2 reviews
5.0
Dined on 5 March 2025
1. Overall 5
2. Food 5
3. Service 4
4. Ambience 5
O Sea participated in OC restaurant week and I needed to try it! Located in the Orange circle, gets a little busy in that area- but the food was very high end with many delicious options. Loved the lobster roll!! Very modern dining
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i
irene
Orange County2 reviews
5.0
Dined on 5 March 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
Wayland was incredible very attentive and helpful!
Is this helpful?

FAQs

O SEA | seafood for thought offers delivery in partnership with Postmates and Uber Eats. O SEA | seafood for thought also offers takeaway which you can order by calling the restaurant at (714) 363-3309.

O SEA | seafood for thought is rated 4.9 stars by 840 OpenTable diners.

O SEA | seafood for thought does offer gift cards which you can purchase here.

Yes, you can generally book this restaurant by choosing the date, time and party size on OpenTable.

Make a booking

2 people

14 Mar 2025

19:00

Booked 21 times today

Experiences are available.

Order delivery or takeout

Google Map for O SEA | seafood for thought

109 S Glassell St, Orange, CA 92866-1421

Additional information

Cross Street
Chapman Ave and S Glassell Street
Area
Orange
Hours of Operation
Lunch Tue–Fri 11:30–16:00 Sat, Sun 10:00–15:00 Brunch Sat, Sun 10:00–15:00 Happy Hour Tue–Fri 14:00–17:00 Dinner Tue–Thu 16:00–20:30 Fri 16:00–21:00 Sat 15:00–21:00 Sun 15:00–20:30
Price
$30 and under
Cuisines
Seafood, Wine Bar, Breakfast
Dining style
Casual Elegant
Dress code
Casual Dress
Parking details
Public Lot
Payment Options
AMEX, Discover, Mastercard, Visa
Executive Chef
German Mejia
Additional
Beer, BYO Wine, Gender Neutral Restroom, Gluten-free Options, Happy Hour, Non-Smoking, Patio/Outdoor Dining, Takeaway, Vegan, Wheelchair Access, Wine

Website
https://eatosea.com/
Phone number
(714) 363-3309

Gift card

Send gift cards instantly by email or print to present in person.

Send a gift card

O SEA | seafood for thought

Make a booking

Order delivery or takeout

Additional information

Gift card

Weekend Brunch at O SEA!

Happy Hour at O SEA - Weekdays from 2-5pm

Rhys & Centennial Mountain Vineyards - Wine Dinner

DAILY OYSTERS

TUNA POKE

LIL BURRITO

smaller things

GRILLED AVOCADO with PICKLED ONIONS US$8.95

BURRATA CHEESE with HONEYNUT JAM | VUS$14.95

WILD TAHITIAN ALBACORE TUNA POKE | DFUS$14.95

FARMED ATLANTIC SALMON CEVICHE | DFUS$14.95

CRISPY CALAMARI US$19.95

WILD MEXICAN WHITE SHRIMP AGUACHILE 'NEGRO' | DF US$14.95

WILD MARYLAND JUMBO LUMP CRAB CAKE US$19.95

HAND ROLL with ALBACORE TUNA or CRISPY SALMON SKIN ‘CHICHARRON’ ea | DFUS$8.95

WILD SPANISH OCTOPUS ‘A LA PLANCHA’ | GFUS$19.95

SPICY WILD TAHITIAN ALBACORE TUNA on CRISPY RICE | DFUS$16.95

O SEA ‘CHOWDAH’ | GF

power lunch picks

CHOICE OF

AND THEN

entree salads

GARDEN SALAD | DF | GFUS$14.95

GREEN GODDESS SALAD | GFUS$16.95

TIJUANA CAESAR | GFUS$16.95

BITTER HARVEST GREENS US$16.95

7oz MARKET PROTEINS

WILD MEXICAN WHITE SHRIMP

WILD TAHITIAN ALBACORE TUNA

FARMED ATLANTIC SALMON

WILD WASHINGTON COD

WILD ECUADORIAN WHITE SEABASS

WILD MEXICAN SWORDFISH

WILD MEXICAN YELLOWTAIL

GRILLED CHICKEN BREAST

SEARED TOFU

entree plates

LEAN & MEAN PLATE | DF | GFUS$24.95

SUPER TUSCAN PLATE | DFUS$29.95

ROASTED BUTTERNUT SQUASH & GARBANZO TAJINE US$29.95

TWO GRILLED FISH TACOS with RICE & BLACK BEANS | DFUS$19.95

O SEA BURRITO US$19.95

finger foods

STEAMED PEI MUSSELS in THAI GREEN CURRY US$21.95

CRISPY OAXACAN HOT SHRIMP US$22.95

WILD WASHINGTON COD FISH & CHIPS | DFUS$24.95

DAD’S DOUBLE CHEESEBURGER US$19.95

WILD TAHITIAN ALBACORE TUNA POKE BOWL US$20.95

DAILY CIOPPINO US$38.95

niños

GRILLED FISH | DF | GFUS$17.95

LIL BURRITO | DFUS$14.95

JR CHEESEBURGER US$13.95

GRILLED CHEESE US$12.95

sweets

THAI MILK TEA BLONDIE SUNDAE US$9.95

CHOCOLATE BREAD PUDDINGUS$11.95

BUTTERMILK PANNA COTTA US$9.95

beverages

NON-ALCOHOLIC

LEMONADE 3.95

ICED TEA US$3.95

DAILY AGUA FRESCA US$3.95

TOPO CHICO bottle US$3.95

MEXICAN COKE bottle US$4.95

DIET COKE bottle US$3.95

SPRITE bottle US$3.95

FRENCH–PRESSED COFFEE OR TEA

THE LOST BEAN COFFEE US$5.95

STEVEN SMITH TEAMAKER US$5.95

ESPRESSO

ESPRESSO SHOTUS$3.95

AMERICANO hot or iced US$4.95

LATTE hot or iced US$4.95

CAPPUCCINO hot or iced US$4.95