Portsmouth sits on the water, so it ought to be a seafood city, and in pockets it genuinely is. The catch is that proper seafood restaurants here are rarer than all the chip shops might suggest, which makes the few good ones worth knowing by name.
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To build this ranking our writers looked at every genuine seafood spot in the city, from a seaside restaurant to a working fishmonger with a raw bar, and weighed them on the same criteria. Aggregate review scores and how many people left them, across Google and Tripadvisor, carry the most; then the quality and range of what the kitchen sends out, the setting, and the price, because we checked real menu figures rather than guessing. A few thousand diners tell you more than any single opinion can.
This is a deliberately short list. The city has only a handful of places that truly put seafood first, so we have ranked the five that earn it rather than padding the field with chip shops, which have their own fish and chips ranking, or with general tables, covered in our best restaurants round-up. It is a living list we revisit as places open, close and change hands.
The ranking runs from the best down, starting at the top, so the strongest all-rounder leads and the rest follow.
1. The Briny, Southsea
Out on Clarence Esplanade, with the Solent and the old sea forts filling the windows, The Briny is the closest Portsmouth has to a destination seafood restaurant. More than two thousand reviews put it just above four and a half stars, which for a place this busy is no small feat. The menu leans on oysters, octopus and whatever is landing well, with sharing plates that suit a long lunch by the water. Expect mains around £16 to £22 and oysters at roughly £3 each, so a proper feast adds up, though the setting earns its keep.
Regulars tend to mention the view and the service in the same breath, and the kitchen handles shellfish with real care. The one recurring gripe is timing, since food can be slow to arrive when every table is full.
What stands out
- A genuine seaside setting looking out to the forts and passing ferries;
- Fresh oysters and well-handled octopus that regulars come back for;
- Over two thousand reviews holding a 4.5 star average;
- Sharing plates built for an unhurried lunch by the water.
What to weigh
- Food can be slow to land when every table is full;
- Oysters by the piece and seafood plates push the bill up;
- Window tables go fast, so booking helps.
For the full Portsmouth seafood experience, view included, nothing else quite matches it, which is why it leads.
2. The A Bar, Old Portsmouth
Tucked by the Camber in Old Portsmouth, The A Bar is a buzzy waterside bistro that happens to do fish very well. It carries a 4.6 average from well over a thousand reviews, and on a Saturday night it hums. The menu runs fish and meat side by side, so it is the pick when half the table wants seabass and the other half wants a steak, with mains landing around £16 to £24.
Diners praise the location and the cooking, and the drawback that comes up most is service, which can drift when the room is packed. Catch a good waiter and it is a five-star night, which is roughly what the reviews say when they stop just short of the top mark.
What stands out
- A lively waterside spot right by the historic Camber;
- A menu that covers fish and meat, handy for a mixed group;
- More than a thousand reviews at a 4.6 average;
- Cooking that locals rate for a special occasion.
What to weigh
- Service can slip when the place is full;
- A bistro rather than a dedicated seafood kitchen, so the fish list is shorter;
- The best waterside tables need booking ahead.
A strong all-rounder with a setting to match, a shade behind The Briny only because seafood shares the billing here rather than owning it.
3. Alandco Seafood Boil, Southsea
For something messier and more hands-on, Alandco brings the Louisiana style seafood boil to a food hall off Middle Street. Mussels, prawns, crab and lobster arrive in a bag of spiced butter sauce with corn and potatoes, and you eat with your fingers. The rating is the highest on this list, a striking 4.8, though from a smaller crowd of under two hundred reviews. Budget around £30 to £40 a head, because shellfish by weight is never cheap.
What people love is the freshness and the generosity, big prawns and plump mussels in a sauce that carries flavour without drowning it. The honest caveats are the price, the odd report of lobster or crab cooked a touch dry, and a casual food-hall room that will not suit a quiet dinner. Check the days too, since it does not open all week.
What stands out
- The highest review average here at 4.8;
- A proper hands-on seafood boil, fresh and generous;
- Big, well-seasoned prawns and mussels in a butter sauce;
- A fun, informal change from a plated restaurant meal.
What to weigh
- The priciest option, around £30 to £40 a head;
- Lobster and crab are occasionally cooked a little dry;
- A busy food-hall setting, not a quiet night out;
- Closed on some days, so check before you go.
Score for score the reviews love it most, but the price, the setting and the thinner review count hold it just below the two waterside names above.
4. Fish Portsmouth, Old Portsmouth
This one bends the rules in the best way. Fish Portsmouth is a working fishmonger on the Camber, not a sit-down restaurant, but it keeps a little raw bar where you can have half a dozen oysters shucked to order or a dressed crab sandwich and eat it looking over the harbour. The range is wider than any ordinary fish counter, the stock is as fresh as it gets, and the staff know their trade. Reckon on around £9 to £12 for half a dozen oysters and about £7 for the crab sandwich.
It earns its place for sheer quality and value, a 4.6 average from more than four hundred reviews, with the obvious caveat that it is daytime only and there is barely anywhere to sit. Come for the freshest, most casual seafood in the city, not for a table and a wine list.
What stands out
- Fishmonger-fresh seafood, about as fresh as Portsmouth gets;
- Oysters shucked to order and a dressed crab sandwich by the harbour;
- Strong value next to a full restaurant;
- A 4.6 average from over four hundred reviews.
What to weigh
- A fishmonger with a counter, not a proper restaurant;
- Daytime hours only and very little seating;
- Limited to whatever is fresh that day.
If freshness is all you care about it may be the best seafood in the city, and it sits here only because you cannot really settle in and make an evening of it.
5. Hartgills Seafood, Portsea
Last but genuinely loved, Hartgills is old-school Portsmouth seafood, a traditional stall in Portsea selling whelks, cockles, prawns, jellied eels and made-up platters to take away or eat on the hoof. The review count is small, around seventy, yet the average holds at a respectable 4.4 and the regulars are fiercely fond of it. It is also the cheapest entry by a distance, with pots of shellfish from around £3 and a seafood platter about £10 to £15.
Ask a local what real Portsmouth seafood tastes like and this is the sort of place they mean.
This is the taste of old Portsmouth, whelks and cockles and jellied eels, served the way the city has eaten from the sea for generations.
What stands out
- Traditional Portsmouth seafood: whelks, cockles, prawns and jellied eels;
- The cheapest option by far, pots from around £3;
- Fresh, plentiful platters the regulars swear by;
- A genuine local institution rather than a polished chain.
What to weigh
- A small operation with a modest review count;
- A basic, no-frills setup with little or no seating;
- Daytime trade, and the cockles can occasionally be a touch sandy.
It will not be for everyone, but for authenticity and value nothing here comes close, a fitting close to a short and honest list.
The five seafood spots at a glance
Here is the shortlist in one view, with a rough price for a typical order.
| # | Restaurant | Area | Typical price | Score (out of 10) | % (out of 100) |
| 1 | The Briny | Southsea | Mains £16-22 | 9.2 | 92 |
| 2 | The A Bar | Old Portsmouth | Mains £16-24 | 8.8 | 88 |
| 3 | Alandco Seafood Boil | Southsea | £30-40 a head | 8.5 | 85 |
| 4 | Fish Portsmouth | Old Portsmouth | Oysters £9-12 for six | 8.2 | 82 |
| 5 | Hartgills Seafood | Portsea | Platter £10-15 | 7.8 | 78 |
Where they land on our ten-point scale (out of 10)
What the shortlist tells us
Two patterns jump out. The first is geography. Portsmouth’s best seafood clusters where the working water still is, around the Camber in Old Portsmouth and along the Southsea front, rather than in the shopping streets inland. The second is the trade-off between a high score and a big crowd. Alandco posts the top average but on under two hundred reviews, while The Briny sits a shade lower on well over two thousand, and in our weighting that depth of evidence counts, which is why the seaside restaurant leads.
Price tells its own story. You can eat superbly here for very little, a few pounds for a pot of whelks at Hartgills or a crab sandwich at the fishmonger, or you can spend forty a head on a boil, and the ranking rewards value rather than the dearest option. The other clear line runs between places you sit down in and places you do not. Two of our five are not conventional restaurants at all, and they make the list on quality alone.
Most of all, the list is short because the honest field is short. The city has fewer dedicated seafood restaurants than its coastline suggests, so a genuine five beats a padded ten.
How we scored, and the caveats
Each place was scored out of ten against the same weighted criteria, adapted for a niche this small. Review scores and reputation across Google and Tripadvisor carried the most at about 35 per cent, the quality and range of the seafood another 25, value for money against the real prices we checked 15, consistency backed by the number of reviews 15, and the setting and atmosphere the final 10. We compared the venues against one another and weighed the open information rather than claiming to have dined at each in the same week. Because Portsmouth genuinely has only a handful of seafood-first places, this is a five-strong list by choice, quality over padding, and it takes in a fishmonger with a raw bar alongside the sit-down rooms. Prices are indicative and move with the catch and the season, and opening days vary, so check the current menu and hours before you set out. This is an editorial snapshot as of October 2026, not an official ranking, and the order may shift as places open, close and change.
