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

O SEA | seafood for thought

4.9 (865)
$30 and under
Seafood
109 S Glassell St, Orange, CA 92866-1421

Make a reservation

2 people
7:00 PM
Booked 22 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!
    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

Menu

O SEA | seafood for thought's menu was last updated on 5/3/2025.

Saturday, May 3rd, 2025

DAILY OYSTERS

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

  • KUMAMOTO

    oakland bay, washington

    • KILIWA

      baja california, mexico

      FINGER FOODS

      • NEW ENGLAND(ISH) LOBSTER ROLL$34.95

        maine lobster - tossed with melted butter, served with charred scallion aioli & classic fries

        MAINS

        • WILD ALASKAN BLACK COD$41.95

          japanese sweet potato puree, charred broccolini, sweet & spicy fish sauce caramel, crispy bacon | GF

          • WILD ROSS SEA CHILEAN SEA BASS$59.95

            crispy brussels, celery root puree, chinese sausage, housemade sweet & sour sauce

            Last updated: May 3, 2025

            What 865 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

              Best Overall

            • Orange County

              Best Food

            • Orange County

              Best Service

            • Orange County

              Best Value

            • Orange County

              Great for fine wines

            • 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 offers an exceptional seafood dining experience with "great service, fresh seafood, and an impressive wine list." The restaurant is praised for its "delicious food and warm atmosphere," making it a "favorite spot" for locals. While some diners note limited dessert options, the overall quality and "attentive staff" consistently impress.

            865 Reviews

            1. Frances

              Orange County7 reviews

              5.0

              Dined 1 day ago

              1. Overall 5
              2. Food 5
              3. Service 5
              4. Ambience 5
              This was the second time at O’Sea. We were here months ago and we brought our friends both time. We had such a fun and fabulous time that last night we brought a different couple. The food was delicious. The staff is very friendly and helpful. The noise level was low so we could have a conversation and actually hear each other. We can’t wait to come back to O’Sea.

              Is this helpful?

            2. Kim VIP

              New York City21 reviews

              5.0

              Dined 1 day ago

              1. Overall 5
              2. Food 5
              3. Service 5
              4. Ambience 5
              Love OSEA- the food and staff are always wonderful!

              Is this helpful?

            3. Linda

              Orange County5 reviews

              5.0

              Dined 3 days ago

              1. Overall 5
              2. Food 5
              3. Service 5
              4. Ambience 5
              O Sea never disappoints- tonight I tried their butternut tanjin with my fish choice of cod which was cooked to perfection!! Sat outside and enjoyed the ambiance of downtown Orange. Thanks O Sea for such fresh food options.

              Is this helpful?

            4. OpenTable Diner

              Orange County1 review

              5.0

              Dined on April 26, 2025

              1. Overall 5
              2. Food 5
              3. Service 5
              4. Ambience 5
              Charming spot in Old Towne Orange for a wonderful sisters luncheon. We split the Green Goddess salad with wild shrimp and the Tuscan platter with swordfish- both were fresh and delicious. The grilled avocado starter is a must try!! Owner, Mike, was on hand to welcome guests and service was great!

              Is this helpful?

            5. suzane VIP

              Orange County38 reviews

              5.0

              Dined on April 25, 2025

              1. Overall 5
              2. Food 5
              3. Service 5
              4. Ambience 5
              The quality of the fish was exceptional. Very fresh.

              Is this helpful?

            6. Pat

              Orange County18 reviews

              5.0

              Dined on April 24, 2025

              1. Overall 5
              2. Food 5
              3. Service 5
              4. Ambience 5
              Food was great, Happy hour is best for people who likes to dine mid day and want to take advantage of the happy hour menu my only issue was they should have more dessert offerings but the one we ordered was delicious

              Is this helpful?

            7. Jennifer

              Los Angeles1 review

              4.0

              Dined on April 20, 2025

              1. Overall 4
              2. Food 5
              3. Service 4
              4. Ambience 4
              I was really looking forward to ordering oysters since I saw a picture of them online but they did not have any on the menu

              Is this helpful?

            8. OpenTable Diner VIP

              Central Coast4 reviews

              5.0

              Dined on April 13, 2025

              1. Overall 5
              2. Food 5
              3. Service 5
              4. Ambience 5
              Sarah, the GM, was fantastic and helped us find a great bottle of wine to pair with our food

              Is this helpful?

            9. Jeff VIP

              Los Angeles158 reviews

              5.0

              Dined on April 13, 2025

              1. Overall 5
              2. Food 5
              3. Service 5
              4. Ambience 5
              Great seafood selection. Nice menu where you can pair different salads and proteins together It fills up fast so a reservation is very helpful

              Is this helpful?

            10. Lisa

              San Francisco1 review

              3.0

              Dined on April 10, 2025

              1. Overall 3
              2. Food 2
              3. Service 5
              4. Ambience 5
              The service and staff were friendly and attentive! However the cod fish chips & tuna on crispy rice was bland.

              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 takeout which you can order by calling the restaurant at (714) 363-3309.

            O SEA | seafood for thought is rated 4.9 stars by 865 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
            7:00 PM
            Booked 22 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
            Gift card

            Gift card

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

            Send a gift card
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