Surf Forecasts:
Shichirigahama surf forecast from 31 Aug 2026:
- Best quality surf: Friday 4 Sep, 12PM (local time) - 2ft (0.6m), 10s period, S swell with offshore winds.
- Most powerful swell: Tuesday 8 Sep, 9AM (local time) - 3.5ft (1.0m), 10s period, SSE swell with 194 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 12PM (local time) - 2ft (0.6m), 10s 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 12PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.4m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Shichirigahama in the next 16 days are 1.0m 10s and forecast to arrive on Tuesday (Sep 08) at 9AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Monday (Sep 07) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Fri 4th Sep) | 2ft (0.6m) 10s |
| Best Surf | 12PM (Fri 4th Sep) | 2ft (0.6m) 10s |
| Most Powerful | 9AM (Tue 8th Sep) | 3.5ft (1.0m) 10s |
Table - best surf conditions forecast for Shichirigahama over the next 16 days.
The Lowdown
Alright folks, Rusty here with the full rundown for the local stretch. We're looking at a pretty quiet start to the forecast window, so don't be in a rush to grab your board. Things are going to be flat and small for a good week, but if you're patient, there's a solid pulse of groundswell lined up for the second week that could be well worth the wait.
Let's break it down.
The first week kicks off with barely a ripple. Tuesday the 1st through to Monday the 7th of September is all about small, weak surf. Heights are a measly 1 ft to 2 ft with short-period swell (7 to 10 seconds) and the combined energy is low, sitting between 20 and 128 units. It's basically a lake. The odd morning shows clean conditions with light offshore winds, but there's just not enough wave height to ride. The wind gets a bit frisky on the weekend, but it's all offshore, so it's clean but gutless. For the first week, you're better off finding another hobby.
We finally get a glimpse of something on Tuesday the 8th of September. The swell starts to build, hitting 3 ft to 5 ft by the afternoon, with a longer period of 10 to 12 seconds. The energy jumps up to 639 units, which is still moderate but feels like a proper pulse. The wind is strong offshore, so it'll be clean but a bit tricky to paddle into. The rating is still a 1 out of 10, so it's right on the edge.
Now, the standout window is Wednesday the 9th and Thursday the 10th of September. This is the one to circle on the calendar. Wednesday morning sees the swell at 6 ft (SSE) with a 14-second period (strong groundswell) and energy ramping up to 1421 units. The wind is light and cross-shore, so the waves will have some shape. Wednesday afternoon gets even better with 8 ft surf, a 14-second period, and a whopping 2064 units of energy. The wind drops to near glassy, offering clean conditions. Thursday morning is the peak for size: 10 ft (SSE) with a 13-second period and intense energy of 3354 units. The wind is a gentle offshore from the NNE, making for some super clean, powerful lines. This is excellent surf, but it's big. At 10 ft, it's expert territory only. The long-period groundswell will be best handled at Shichirigahama, which is a river mouth – it should focus that energy into nice shaped waves. Keep in mind the crowd factor here; it's listed as "sometimes" busy, so respect the lineup.
The water temperature is 83°F, which is a touch warmer than normal for the time of year, so you can leave the wettie at home.
After that peak, the swell backs off. Friday the 11th and Saturday the 12th of September get messy with onshore winds and choppy conditions. The swell drops to 4 ft to 6 ft, but the quality goes with the wind. Sunday the 13th and Monday the 14th of September see a return to smaller, clean offshore conditions, but the swell is down to 3 ft or less, so it's just small and fun for the longboard.
The very end of the window, Tuesday the 15th and Wednesday the 16th of September, shows another big pulse. Tuesday afternoon looks bumpy with 12 ft and onshore wind, but Wednesday morning the 16th is very promising. The swell is 8 ft (S) with an 11-second period, and the wind is glassy – a rare combination. That will be a great session if the forecast holds, though it's still about a week and a half away, so keep an eye on it.
For the best on offer, no doubt about it: Wednesday the 9th and Thursday the 10th of September at Shichirigahama. The conditions are clean, the swell is strong and from the optimum direction (SSE), and the energy is through the roof. It's a big swell, so it's for the experienced crew, but it's the real deal.
Rusty.
Short Range ForecastHeavy rain (total 23mm), heaviest during Thu night. Warm (max 27°C on Tue afternoon, min 21°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 56mm), heaviest during Sun night. Warm (max 25°C on Sat afternoon, min 19°C on Sun night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
AM | PM | 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) | E 12 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 9 | S 9 | S 9 | SSW 12 | S 10 | S 10 | SSW 9 | S 8 | S 8 | SSW 8 | SSW 8 | SE 8 | SE 7 | SE 8 | SSE 7 | SSE 9 |
Wave Graph | |||||||||||||||||||||
14 | 15 | 14 | 14 | 24 | 25 | 39 | 38 | 27 | 70 | 65 | 84 | 69 | 34 | 21 | 13 | 10 | 14 | 29 | 37 | 78 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | glassy | glassy | on | on | on | cross-on | on | off | off | off | off | off | off | off | off | off | cross-off | off | off |
High Tide | 7:05PM1.57m | 8:12AM1.30m | 7:32PM1.55m | 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 | |||||||||
Low Tide | 12:53PM0.70m | 1:45AM0.39m | 1:14PM0.83m | 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 | |||||||||
5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:16 | — | — | |
— | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — | 6:06 | — | — | 6:04 | — | — | 6:02 | — | — | 6:00 | — | |
mm | — | — | — | — | — | — | — | 2 | 21 | 4 | 7 | 3 | 1 | 2 | — | — | 2 | 37 | 6 | 3 | 1 |
Temp °C | 26 | 27 | 26 | 27 | 27 | 27 | 27 | 27 | 23 | 23 | 22 | 22 | 23 | 25 | 23 | 23 | 23 | 21 | 21 | 22 | 22 |
Feels °C | 28 | 30 | 29 | 29 | 28 | 29 | 30 | 28 | 25 | 22 | 22 | 21 | 21 | 22 | 21 | 18 | 19 | 17 | 18 | 20 | 20 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 9 | S 9 | S 9 | SSW 4 | S 10 | S 10 | SSW 9 | S 8 | S 8 | SSW 8 | SSW 8 | SE 8 | SE 7 | SE 8 | SSE 7 | SSE 9 |
14 | 15 | 14 | 14 | 24 | 25 | 39 | 38 | 10 | 70 | 65 | 84 | 69 | 34 | 21 | 13 | 10 | 14 | 29 | 37 | 78 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SSW 10 | SE 10 | SE 10 | SSW 8 | SE 9 | SE 7 | SE 7 | SE 8 | SE 8 | SE 8 | SE 8 | SSW 8 | S 9 | S 9 | S 9 | SSW 9 |
4 | 4 | 4 | 4 | 4 | 10 | 4 | 4 | 23 | 20 | 8 | 23 | 53 | 11 | 10 | 10 | 7 | 2 | 1 | 1 | 7 | |
Swell 3 Height (m) Direction Period (s) | E 12 | E 12 | E 11 | E 10 | E 10 | SE 11 | E 10 | E 10 | SSW 12 | E 9 | SSE 9 | SE 12 | E 9 | — | — | — | SW 10 | SW 10 | SE 11 | NE 4 | SSW 8 |
11 | 11 | 2 | 2 | 2 | 4 | 2 | 2 | 27 | 6 | 8 | 6 | 6 | — | — | — | 4 | 4 | 5 | 1 | 7 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | SSW 2 | SW 4 | — | ENE 2 | — | NE 3 | ENE 3 | ENE 3 | NE 3 | ENE 3 | NE 4 | N 4 | N 4 | NNE 3 |
— | — | — | — | — | — | — | 1 | 6 | — | 1 | — | 2 | 1 | 3 | 9 | 4 | 12 | 27 | 10 | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 42 | 20 | 34 | 20 | 22 | 22 | 34 | 34 | 13 | 3 | 4 | 0 | 4 | 42 | 506 | 483 | 466 | 466 | 34 | 34 | 225 |
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.











