O SEA | seafood for thought

4.9 (879)

$30 and under

Seafood

109 S Glassell St, Orange, CA 92866-1421

Make a reservation

2 people

Jun 1, 2025

June 2025

7:00 PM

Booked 20 times today

Experiences are available.

About this restaurant

Neighborhood gem
Great for fine wines
Good for special occasions

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.

Additional information

Dining style
Casual Elegant
Price
$30 and under
Cuisines
Seafood, Wine Bar, Breakfast
Hours of operation
Lunch Tue–Fri 11:30 am–4:00 pm Sat, Sun 10:00 am–3:00 pm Brunch Sat, Sun 10:00 am–3:00 pm Happy Hour Tue–Fri 2:00 pm–5:00 pm Dinner Tue–Thu 4:00 pm–8:30 pm Fri 4:00 pm–9:00 pm Sat 3:00 pm–9:00 pm Sun 3:00 pm–8:30 pm
Phone number
(714) 363-3309
Website
https://eatosea.com/
Payment options
AMEX, Discover, Mastercard, Visa
Dress code
Casual Dress
Executive chef
German Mejia
Delivery & takeout
Order direct

Location
109 S Glassell St, Orange, CA 92866-1421
Neighborhood
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, Takeout, Vegan, Wheelchair Access, Wine

Gift card

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Experiences

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!
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!
O SEA Fourth Anniversary Grand Wine Tasting Soiree
$75.00 per person
Prepaid
Jun 19, 2025 only
Multiple times
Time sure flies when you're having fun, they say... This June, O SEA is proud to celebrate its fourth anniversary of business, and we couldn't think of any better way than our favorite event of the year - our Fourth Anniversary Grand Wine Tasting Soiree. This coming Thursday, June 19th, join us as we open over 40+ wines from all over the globe and offer a toast to four years of O SEA! Two ticket offerings are available - 5:30pm or 7:30pm, all you can sip, tray-passed snacks, AND limited-availability wines available to take home at special retail pricing. Tickets are now available, you don't want to miss this!

Popular dishes

TO SHARE - WHOLE WILD MEXICAN VERMILLION ROCKFISH 'AL PASTOR'$68.95
grilled pineapple, pico de Gallo, avocado salsa - mejorado corn or flour tortillas
WILD MARYLAND SOFT SHELL CRABS$39.95
corn meal-crusted, herbed yogurt, chermoula, roasted spring snap peas
WILD BRITISH COLUMBIAN HALIBUT$49.95
smoky chili verde sauce, masa dumplings, crispy bacon, roasted baby corn | GF DF

What 879 people are saying

O SEA | seafood for thought reviews from people who’ve dined at this restaurant. Based on recent rating.

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

Review summary

AI-generated from verified diner reviews

O SEA is a standout seafood spot known for its "excellent food" and "amazing service." With "fresh and excellently prepared" fish, "beautifully curated wine list," and "warm and attentive" staff, it creates an inviting atmosphere. Highlights include the "best crab cake," "wonderful ambiance," and "perfectly cooked" seafood dishes, making it a must-visit in Orange.

879 Reviews

j
jamie VIP
Los Angeles78 reviews
5.0
Dined 1 day ago
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
Food and service was great! Excellent wine list. Save room for dessert !!
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M
Matt VIP
Los Angeles818 reviews
5.0
Dined 2 days ago
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
Enjoyed the soft shell crabs. They go well with oysters and fries.
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S
Sylvia VIP
San Francisco Bay Area10 reviews
5.0
Dined on May 24, 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 4
The food was very good. Loved the Oysters. Service was very good and they accommodated our graduation ballon’s which were fairly big. We will certainly again.
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A
Allan VIP
Orange County204 reviews
5.0
Dined on May 18, 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
Good food, wine and service! We enjoy O Sea, and come periodically.
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M
Matt VIP
Los Angeles818 reviews
5.0
Dined on May 17, 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
The soft shell crab was excellent and so were the oysters, fries and calamari. Great service.
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F
Frances
Orange County1 review
2.0
Dined on May 17, 2025
1. Overall 2
2. Food 3
3. Service 1
4. Ambience 4
Ambiance, decor, music were good. Food was decent. Soft shell crab was the highlight. Lean and mean plates, fish and chips were also good. Crispy Oaxacan hot shrimp were too salty and overcooked, but had a good amount amount of shrimp. Mussels were good, but a tiny bit sweet and the chili oil add was not worth $1.95 and wasn't even spicy. It would've been nicer if the bread was on the side instead of served already soaking in the broth. Creamsicle mimosa was sweet, but good. Service was not good. It took ages for the waiter to come every time. The restaurant was not even half full. We were a table of 6 and there was a table of 9 and 4 tables of 2, which all had faster service. I wanted to order a second mimosa and gave up after trying to catch the waiters attention for 10 min. The busser was too fast to try to clear out some plates, but then had to be reminded to clear out others. The tables are too tiny to be inefficient about clearing plates. Too expensive for this frustrating of an experience. Would not return.
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R
Ruben
Orange County3 reviews
5.0
Dined on May 16, 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
O Sea is always consistent. We enjoy having dinner here.
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R
Richard VIP
Orange County22 reviews
5.0
Dined on May 16, 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
The Tuscan entree gets better every time. And the white brownies are amazing. Our favorite Orange restaurant.
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E
Eryn
Cancun / Riviera Maya2 reviews
5.0
Dined on May 12, 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
Amazing experience for Mothers Day! I arrived early for a reservation and had to add one member last minute and they were extremely accommodating. It was our entire party’s first time and everything was delicious. The PEI mussels were a standout.
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R
Robin VIP
Los Angeles17 reviews
5.0
Dined on May 11, 2025
1. Overall 5
2. Food 5
3. Service 5
4. Ambience 5
A perfect Mother’s Day lunch with my daughter. Sara you were so attentive to the patrons , our waiter was so helpful and the food was outstanding!! We cannot wait to come back and try a few more dishes. The restaurant is decorated so cute and so immaculate. Thank you 😊 Robin & Amy
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FAQs

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

O SEA | seafood for thought is rated 4.9 stars by 879 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 reservation

Booked 20 times today

Experiences are available.

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
Neighborhood
Orange
Hours of operation
Lunch Tue–Fri 11:30 am–4:00 pm Sat, Sun 10:00 am–3:00 pm Brunch Sat, Sun 10:00 am–3:00 pm Happy Hour Tue–Fri 2:00 pm–5:00 pm Dinner Tue–Thu 4:00 pm–8:30 pm Fri 4:00 pm–9:00 pm Sat 3:00 pm–9:00 pm Sun 3:00 pm–8:30 pm
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, Takeout, Vegan, Wheelchair Access, Wine
Delivery & takeout
Order direct

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 reservation

About this restaurant

Additional information

Gift card

Experiences

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

Weekend Brunch at O SEA!

O SEA Fourth Anniversary Grand Wine Tasting Soiree

Popular dishes

lil burrito

Lil Burrito

DAILY CIOPPINO

Menu

DAILY OYSTERS

KUMAMOTO

BAJA BABE

MAINS

TO SHARE - WHOLE WILD MEXICAN VERMILLION ROCKFISH 'AL PASTOR'$68.95

WILD MARYLAND SOFT SHELL CRABS$39.95

WILD BRITISH COLUMBIAN HALIBUT$49.95

What 879 people are saying

Overall ratings and reviews

Loved For

Review summary

FAQs

Does O SEA | seafood for thought offer delivery through OpenTable or takeout?

How is O SEA | seafood for thought restaurant rated?

Does O SEA | seafood for thought offer gift cards?

Is O SEA | seafood for thought currently accepting reservations?

Make a reservation

Additional information

Gift card

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