Surf Forecasts:
Shichirigahama surf forecast from 21 Aug 2026:
- Best quality surf: Monday 24 Aug, 6AM (local time) - 1.5ft (0.5m), 19s period, SSE swell with glassy winds.
- Most powerful swell: Monday 24 Aug, 6PM (local time) - 5.5ft (1.7m), 16s period, SSE swell with 1,393 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 3AM (local time) - 2ft (0.6m), 13s period with SSE swell.
Best Forecast Surf Conditions for Shichirigahama this week:
The surf forecast for Shichirigahama over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 24) at 3AM. The primary swell is predicted to be 0.6m and 13s period with a secondary swell of 0.3m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Shichirigahama in the next 16 days are 1.7m 16s and forecast to arrive on Monday (Aug 24) at 6PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Friday (Aug 28) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 24th Aug) | 2ft (0.6m) 13s |
| Best Surf | 6AM (Mon 24th Aug) | 1.5ft (0.5m) 19s |
| Most Powerful | 6PM (Mon 24th Aug) | 5.5ft (1.7m) 16s |
Table - best surf conditions forecast for Shichirigahama over the next 16 days.
The Lowdown
Righto, Rusty here. Let’s talk about what’s happening at Shichirigahama (Shichigahama). This is a river mouth, and it’s inconsistent, so it’s not a spot you can just rock up to and expect waves. The 16-day outlook is a real mixed bag – mostly small and messy, but there are a couple of windows worth keeping an eye on.
The water temp is sitting at 81°F, which is just about normal for the time of year, so no wetsuit needed.
The first few days are a write-off. Friday afternoon is onshore and weak, and Saturday slides in with glassy 1ft waves on the morning, but the swell is tiny and the conditions are poor. That lasts through Sunday and Monday. Monday morning sees a long-period 20-second groundswell sneak in from the SSE, with a combined energy of 587 (moderate), but it’s still only 2ft – not enough to get excited about.
Things look a bit more promising on Tuesday, August 25th. The morning brings a 5ft S swell with a 14-second period, pushing the combined energy up to 1315 (strong). That’s a solid size for intermediates, but it’s onshore wind from the SSW, so it’ll be a bit bumpy. The afternoon gets bigger at 6ft, but the wind picks up to 15 mph from the south, making it lumpy. That’s expert-only territory if you’re brave, but the wind is a problem.
The real standout, and the one I’d pencil in, is the morning of Saturday, September 5th. The swell is 3ft from the S with a 12-second period, giving a combined energy of 267 (moderate). The wind is a clean cross-offshore from the ENE at 9 mph, so the waves will be clean and lined up. The forecast says “expect good surf conditions,” and for a river mouth that’s inconsistent, this is the best you’re going to get. It’s not huge, but it’ll be fun. Crowds are sometimes a factor here, so expect a few others. The afternoon has a 3ft S swell, but the wind goes cross-on, so the morning is the pick.
Between now and that Saturday, there’s a long gap of flat or poor conditions. You’ll be waiting nearly two weeks for that clean session. The Monday afternoon (August 31st) and Tuesday (September 1st) have some clean offshore wind, but the swell is tiny (2ft), so it’s not worth a special trip.
Bottom line: the best surf on offer is the morning of Saturday, September 5th. It’s a small, clean wave that’ll suit a longboard or a funboard. The rest of the window is either too small, too windy, or too messy. Keep an eye on the forecasts, but don’t hold your breath.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Sat night. Warm (max 28°C on Sat morning, min 24°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Thu afternoon. Warm (max 28°C on Tue morning, min 23°C on Thu afternoon). Winds decreasing (fresh winds from the S on Tue afternoon, calm by Thu afternoon). | ||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||
Wave Height (m) Direction Period (s) | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SE 13 | SE 13 | SSE 19 | SSE 16 | SSE 14 | S 14 | S 14 | S 13 | SSW 12 | SSW 12 | SSW 12 | SSW 10 | SSW 5 | S 7 |
Wave Graph | |||||||||||||||||||
35 | 32 | 32 | 31 | 25 | 27 | 82 | 295 | 697 | 966 | 861 | 1179 | 784 | 545 | 619 | 422 | 56 | 69 | 60 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | off | cross-off | cross-on | on | on | on | on | on | on | on | on | on | on | on | cross-on | on |
High Tide | 9:20PM1.38m | 5:30PM1.29m | 10:31PM1.31m | 4:48PM1.36m | 00:49AM1.28m | 4:54PM1.41m | 2:21AM1.33m | 5:05PM1.44m | 3:19AM1.40m | 5:16PM1.46m | 4:04AM1.47m | 5:28PM1.47m | |||||||
Low Tide | 6:47AM0.47m | 7:34PM1.28m | 8:09AM0.39m | 9:21PM1.20m | 9:06AM0.32m | 9:56PM1.11m | 9:48AM0.27m | 10:20PM1.01m | 10:23AM0.25m | 10:42PM0.89m | 10:52AM0.27m | 11:05PM0.77m | |||||||
— | 5:05 | — | — | 5:05 | — | — | 5:07 | — | — | 5:07 | — | — | 5:09 | — | — | 5:09 | — | — | |
6:23 | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:19 | — | — | 6:17 | — | — | 6:16 | — | |
mm | — | — | — | 13 | 1 | — | — | — | — | — | — | — | — | — | — | — | 2 | 8 | 8 |
Temp °C | 27 | 28 | 28 | 27 | 27 | 28 | 26 | 27 | 27 | 27 | 28 | 28 | 27 | 27 | 27 | 26 | 25 | 24 | 24 |
Feels °C | 29 | 31 | 31 | 30 | 28 | 30 | 29 | 29 | 28 | 29 | 29 | 27 | 27 | 29 | 27 | 27 | 26 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SE 13 | SSE 16 | SSE 16 | SSE 14 | S 14 | S 14 | S 13 | SSW 12 | SSE 9 | SSE 9 | SSW 10 | SSE 9 | S 7 |
35 | 32 | 32 | 31 | 25 | 14 | 82 | 229 | 697 | 966 | 861 | 1179 | 784 | 545 | 33 | 33 | 56 | 17 | 60 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | S 4 | SE 10 | SE 10 | SE 10 | SE 13 | SSW 8 | SSE 19 | SSE 18 | S 16 | S 18 | ESE 13 | E 13 | SSE 10 | E 12 | E 11 | SSE 8 | — | SSW 8 |
4 | 3 | 4 | 4 | 4 | 27 | 14 | 295 | 427 | 438 | 390 | 59 | 3 | 37 | 3 | 2 | 13 | — | 7 | |
Swell 3 Height (m) Direction Period (s) | S 9 | SE 10 | SE 11 | SE 11 | SE 13 | SSE 4 | S 18 | SSE 12 | SW 9 | ESE 12 | ESE 14 | SW 10 | ESE 13 | E 12 | SE 15 | E 16 | SSE 10 | — | SSE 10 |
2 | 4 | 5 | 5 | 7 | 2 | 6 | 96 | 3 | 26 | 39 | 15 | 56 | 3 | 9 | 5 | 10 | — | 9 | |
Wind waves Height (m) Direction Period (s) | SSW 4 | S 5 | S 5 | S 5 | — | SE 4 | — | — | SSW 8 | SW 10 | SW 10 | S 4 | SSW 4 | — | SSW 12 | SSW 12 | SSW 5 | SSW 5 | — |
8 | 10 | 7 | 7 | — | 3 | — | — | 6 | 59 | 45 | 13 | 9 | — | 619 | 422 | 38 | 69 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 81 | 22 | 80 | 59 | 54 | 20 | 10 | 15 | 81 | 10 | 80 | 81 | 10 | 10 | 34 | 23 | 90 | 80 | 10 |
Best forecast wave conditions in Kanagawa | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Shichirigahama Surf forecast
The above surf forecast table for Shichirigahama provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Shichirigahama can be found by selecting the local surf guide option on the grey menu. Our Shichirigahama surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Shichirigahama) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Shichirigahama may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Shichigahama is 6 km (4 miles) from the city of Chigasaki. If you plan a holiday in Kanagawa, look for hotels and other accommodation in Chigasaki. Chigasaki has rooms for a wide range of budgets as well as car hire and transport links.











