Surf Forecasts:
Shichirigahama surf forecast from 2 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 3AM (local time) - 5ft (1.5m), 11s period, S swell with glassy winds.
- Most powerful swell: Wednesday 9 Sep, 3AM (local time) - 11ft (3.5m), 12s period, S swell with 3,035 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 12AM (local time) - 2ft (0.6m), 11s period with S 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 Friday (Sep 04) at 12AM. The primary swell is predicted to be 0.6m and 11s period with a secondary swell of 0.1m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Shichirigahama in the next 16 days are 3.5m 12s and forecast to arrive on Wednesday (Sep 09) at 3AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Sunday (Sep 06) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 4th Sep) | 2ft (0.6m) 11s |
| Best Surf | 3AM (Tue 8th Sep) | 5ft (1.5m) 11s |
| Most Powerful | 3AM (Wed 9th Sep) | 11ft (3.5m) 12s |
Table - best surf conditions forecast for Shichirigahama over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's be straight up with this one. The 16-day window for our local zone doesn't look great at all. There's a lot of time with barely a ripple, and what does show up is often messy or just too small to get excited about.
For the first week, it’s a tough watch. From now through the start of September, we’re dealing with tiny, weak swells and poor conditions on offer. The wind is predominantly offshore, but the swell energy is just pathetic, with combined energy readings barely hitting three digits. We are looking at a stretch of days with nothing worth paddling out for.
The one real standout in this entire outlook is on Thursday, September 10th at Shichigahama. Look, this break is a river mouth, which means it's inconsistent and tricky, but for this one day, the stars align. The morning has a 6ft S swell pushing in, and combined energy is 821 – that’s moderate energy and the biggest we’ve seen. The wind is a light offshore breeze from the NE at 6 mph, cleaning it all up. Then into the afternoon, it gets even better with glassy conditions and a 4ft S swell. For a spot that rarely breaks with any quality, this is the session to target. The water temp is about 81°, which is a touch warmer than average for this time of year, so a spring suit or just boardshorts will do.
After that Thursday, it’s back to tiny dribble until the second week. Around September 16th and 17th, a bigger pulse of swell shows up – we’re talking 7ft to 7ft from the SSE. But the wind is onshore or just messy and the quality is poor. For a river mouth, that size with onshore wind is going to be a washing machine, not surfable. It might get interesting for the kite crew, but for a paddle surfer, it’s a no-go.
So my call is simple: if you can, point your van towards Shichigahama on the 10th. It’s inconsistent, and crowds are possible, but that swell with clean conditions is the only real highlight in a pretty bleak 16-day stretch.
Rusty.
Short Range ForecastHeavy rain (total 119mm), heaviest during Fri night. Warm (max 28°C on Thu morning, min 21°C on Fri night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 119mm), heaviest during Tue afternoon. Warm (max 27°C on Tue morning, min 20°C on Sat night). Winds increasing (calm on Mon night, near gales from the S by Tue afternoon). | ||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | ||||||||||||||
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) | S 9 | S 9 | S 9 | S 11 | S 10 | SSW 10 | SSW 9 | SSW 10 | SSW 9 | SSW 8 | SSW 8 | SE 7 | SE 8 | SSE 7 | SSE 7 | S 8 | S 10 | S 10 | S 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 37 | 39 | 94 | 91 | 73 | 55 | 50 | 36 | 26 | 23 | 14 | 25 | 67 | 66 | 78 | 493 | 479 | 371 | 1659 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-off | off | off | off | off | off | off | cross-off | off | cross-off | off | on | cross-on | cross-on | cross-on | on |
High Tide | 9:15AM1.18m | 7:59PM1.49m | 11:18AM1.09m | 8:28PM1.42m | 9:04PM1.32m | 4:27PM1.34m | 11:39PM1.24m | 4:24PM1.40m | 1:50AM1.27m | 4:34PM1.43m | 2:58AM1.36m | ||||||||
Low Tide | 2:34AM0.42m | 1:27PM0.97m | 3:41AM0.47m | 12:52PM1.08m | 5:26AM0.51m | 7:15AM0.47m | 9:04PM1.21m | 8:27AM0.40m | 9:35PM1.10m | 9:17AM0.35m | 9:58PM0.98m | ||||||||
 |  |  |  | | |  |  | |  | |  | | |  | |  | | | |
 | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — |
 | 6:07 | — | 6:07 | — | — | 6:06 | — | — | 6:04 | — | — | 6:02 | — | — | 6:00 | — | — | 6:00 | — |
mm | 1 | — | 1 | 1 | 3 | 5 | 96 | 10 | 2 | 7 | 5 | 21 | 24 | 1 | 6 | 24 | 12 | 19 | 11 |
Temp °C | 27 | 28 | 28 | 24 | 25 | 24 | 21 | 22 | 22 | 22 | 21 | 21 | 21 | 23 | 24 | 26 | 27 | 27 | 27 |
Feels °C | 30 | 29 | 28 | 22 | 27 | 25 | 21 | 21 | 20 | 19 | 16 | 18 | 17 | 26 | 27 | 30 | 30 | 24 | 26 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | SE 10 | S 11 | S 10 | SSW 10 | SSW 9 | SSW 10 | SSW 9 | SSW 8 | SSW 8 | SE 7 | SE 8 | SSE 7 | SSE 7 | S 8 | S 10 | S 10 | — |
| kJ | 37 | 39 | 4 | 91 | 73 | 55 | 50 | 36 | 26 | 23 | 14 | 25 | 67 | 66 | 78 | 224 | 479 | 371 | — |
Swell 2 Height (m) Direction Period (s) | SSW 10 | SE 10 | S 13 | SE 10 | SE 6 | SE 7 | SE 9 | SE 7 | SE 7 | SE 8 | SE 8 | SSW 8 | SSW 9 | SSW 8 | SSW 9 | SSW 12 | E 10 | SE 10 | — |
| kJ | 10 | 4 | 3 | 4 | 9 | 11 | 12 | 7 | 9 | 10 | 10 | 7 | 7 | 7 | 15 | 46 | 2 | 26 | — |
Swell 3 Height (m) Direction Period (s) | SE 11 | E 10 | E 10 | SE 10 | SE 9 | SE 9 | E 9 | E 9 | E 13 | — | E 12 | SE 8 | SW 10 | SW 9 | SW 8 | SE 13 | ESE 10 | ESE 10 | — |
| kJ | 4 | 2 | 2 | 15 | 3 | 3 | 7 | 6 | 3 | — | 3 | 3 | 4 | 3 | 18 | 7 | 10 | 10 | — |
Wind waves Height (m) Direction Period (s) | — | — | S 9 | NE 3 | — | NNE 2 | N 3 | — | NE 3 | NE 4 | NE 4 | NNE 4 | N 4 | — | S 3 | S 8 | — | — | S 13 |
| kJ | — | — | 94 | 2 | — | 1 | 1 | — | 3 | 15 | 25 | 15 | 7 | — | 1 | 493 | — | — | 1659 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 80 | 90 | 23 | 0 | 3 | 3 | 4 | 42 | 485 | 483 | 483 | 483 | 483 | 3 | 10 | 8 | 548 | 487 | 485 |
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.
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