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O Sea Interior - O SEA | seafood for thought, Orange, CA

O SEA | seafood for thought

4.9 (890)
$30 and under
Seafood
109 S Glassell St, Orange, CA 92866-1421

Make a reservation

2 people
9:30 PM
Booked 15 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
  • 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

  • Date Night at O SEA

    Multiple dates available
    The deal of the season has arrived! Your Choice of Four Courses to Share + Your Choice of A Bottle of Wine Available every Tuesday, Wednesday, Thursday evening $99.95 For Two Guests Check the menu below in 'Menus'
    Date Night at O SEA Photo

  • 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!
    Happy Hour at O SEA - Weekdays from 2-5pm Photo

  • 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!
    Weekend Brunch at O SEA! Photo

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Menu

O SEA | seafood for thought's menu was last updated on 6/29/2025.

Sunday, June 29th, 2025

DAILY OYSTERS

served with thai red curry cocktail sauce, citrus mignonette, tajin'd lime

  • KUMAMOTO

    oakland bay, washington

    • NAUTILUS

      san quintin bay, baja california, mexico

      MAINS

      • WILD MARYLAND SOFT SHELL CRABS$22.95

        corn meal-crusted, herbed yogurt, chermoula

        • WILD BRITISH COLUMBIAN HALIBUT$49.95

          smoky chili verde sauce, masa dumplings, crispy bacon, roasted baby corn | GF DF

          • WILD COLUMBIA RIVER KING SALMON with SUMMER CORN VELOUTE$52.95

            sweet & spicy salsa matcha, fire-roasted corn, roasted snap peas, oregano croutons, pepitas , grilled lime

            • FARMED BAJA PACIFICO STRIPED BASS 'AL PASTOR'$58.95

              grilled pineapple, pico de gallo, avocado salsa - mejorado corn or flour tortillas

              Last updated: June 29, 2025

              What 890 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
              • 4.8Food
              • 4.9Service
              • 4.8Ambience
              • 4.6Value

              Noise • Moderate

              Loved For

              • Orange County

                Seafood

              • North Orange County

                Best Food

              • North Orange County

                Best Ambiance

              • North Orange County

                Great for fine wines

              • North Orange County

                Seafood

              Review summary

              AI-generated from verified diner reviews
              O SEA offers a "unique and interesting" menu with "fresh and tasty food," making it a standout seafood destination. The ambiance is "calm and inviting," complemented by "friendly and attentive" staff. Diners rave about the "excellent wine list" and "delicious menu items." This Orange Circle gem consistently delivers quality.
              890 Reviews

              1. Gregory

                Orange County2 reviews

                2.0

                Dined 1 day ago

                1. Overall 2
                2. Food 2
                3. Service 3
                4. Ambience 3
                Its a well intentioned restaurant with nice people but the food is not consistent with the high price and the meals are not exciting to the palette they become monotonous after a few bites and don't leave the diner with a memorable culinary experience.

                Is this helpful?

              2. Alex VIP

                Orange County3 reviews

                5.0

                Dined 2 days ago

                1. Overall 5
                2. Food 5
                3. Service 5
                4. Ambience 5
                Always amazing! Wines, food, ambiance - SoCals best seafood hands down.

                Is this helpful?

              3. Robin

                Orange County1 review

                5.0

                Dined 3 days ago

                1. Overall 5
                2. Food 5
                3. Service 5
                4. Ambience 5
                Excellent food, ambience, and service. We will be back

                Is this helpful?

              4. Janel

                Orange County29 reviews

                5.0

                Dined 5 days ago

                1. Overall 5
                2. Food 5
                3. Service 5
                4. Ambience 4
                Excellent poke bowl - the perfect lunch for a warm day. My lunch companion enjoyed her spicy mussels too. Good but unobtrusive service and a very clean environment.

                Is this helpful?

              5. Michelle VIP

                Orange County11 reviews

                5.0

                Dined 6 days ago

                1. Overall 5
                2. Food 5
                3. Service 5
                4. Ambience 5
                Great food and great service. And the menu is unique and interesting.

                Is this helpful?

              6. Dr Mark

                Denver / Colorado12 reviews

                5.0

                Dined on June 16, 2025

                1. Overall 5
                2. Food 5
                3. Service 5
                4. Ambience 4
                Best seafood experience I have had in a while. Excellent menu and wine list. Will return every time I am in So. California.

                Is this helpful?

              7. Peter VIP

                California Central Coast59 reviews

                5.0

                Dined on June 15, 2025

                1. Overall 5
                2. Food 5
                3. Service 5
                4. Ambience 4
                The Food and Service were both well noting. The food was fresh and well prepared. The service was attentive and accommodating, especially due to my wife’s dietary restrictions.

                Is this helpful?

              8. Andrew

                Orange County6 reviews

                5.0

                Dined on June 14, 2025

                1. Overall 5
                2. Food 5
                3. Service 5
                4. Ambience 5
                The restaurant took us from the bustling Orange Circle into a calming environment which included: expedient service, a great/affordable wine list, friendly staff, and a modern take on seafood which hit the spot. 5/5. We’re coming back again.

                Is this helpful?

              9. Marcel

                California Central Coast3 reviews

                5.0

                Dined on June 9, 2025

                1. Overall 5
                2. Food 5
                3. Service 5
                4. Ambience 5
                It was our first time to O SEA. Great good with a nice selection of entrees. The service was also very good. I would back.

                Is this helpful?

              10. Mary Ann VIP

                Los Angeles26 reviews

                5.0

                Dined on June 7, 2025

                1. Overall 5
                2. Food 5
                3. Service 5
                4. Ambience 4
                Table of 7 for an early lunch before visiting the Hilbert. Delicious and relaxing.

                Is this helpful?

              FAQs

              O SEA | seafood for thought does offer delivery in partnership with 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 890 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.

              1. Home
              2. United States
              3. Orange County
              4. North Orange County
              5. Orange

              Make a reservation

              2 people
              9:30 PM
              Booked 15 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
              Gift card

              Gift card

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

              Send a gift card
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