Surf Forecasts:
Shichirigahama surf forecast from 14 Sep 2026:
- Best quality surf: Monday 21 Sep, 12AM (local time) - 7ft (2.2m), 14s period, S swell with offshore winds.
- Most powerful swell: Monday 21 Sep, 3PM (local time) - 10ft (3.0m), 14s period, S swell with 3,747 kJ wave energy.
- Next surfable swell (1★+): Monday 21 Sep, 12AM (local time) - 7ft (2.2m), 14s 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 Monday (Sep 21) at 12AM. The primary swell is predicted to be 2.2m and 14s period with a secondary swell of 1.3m and 10s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Shichirigahama in the next 16 days are 3.0m 14s and forecast to arrive on Monday (Sep 21) at 3PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Monday (Sep 21) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 21st Sep) | 7ft (2.2m) 14s |
| Best Surf | 12AM (Mon 21st Sep) | 7ft (2.2m) 14s |
| Most Powerful | 3PM (Mon 21st Sep) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Shichirigahama over the next 16 days.
The Lowdown
Alright, Rusty here again, putting it in feet and Fahrenheit.
First off, the water is running at about 81°, which is a touch warmer than normal for this time of year. A spring suit will be fine.
For the next several days, it's dead flat. Don't even bother paddling out. We’re looking at ankle-slappers with no power through to the end of the week. The swell energy is barely registering at under 60. The wind is clean, offshore even, but there’s zero swell to break. From Monday the 23rd through the end of the month, it stays quiet. It’s a long stretch of nothing.
Now, for the good stuff. The swell window opens up on Saturday, 19 September. The wind is offshore and clean—massive bonus. A solid southeast groundswell starts to build. Saturday morning we’re seeing 6ft from the SSE with an incredibly long period of 15 seconds. By the afternoon, it's 6ft, and the combined energy is strong at around 1368. This will be a powerful, clean swell for the experienced crew.
Sunday the 20th holds steady: 7ft SSE swell, still with that long 14-second period. The combined energy pushes to 2012 (strong). The wind stays offshore. This is the highlight of the run. The ocean will be clean and heavy. With that long period, it might close out on the beach, but anywhere with a point or a good bank will be firing.
The big event is Monday, 21 September. Circle this one. We're talking 8ft to 10ft from the south at 14 seconds. The combined energy is a massive 3747 (very strong). This is total beef, for experts only. Offshore winds will keep it glassy and perfect. This is a session you will remember.
After Monday, the 22nd, it fades quickly back to 3ft and then gone.
Shichirigahama is a river-mouth break and rarely holds a consistent shape. It likes the swell from the SSW, and the big swells we have are more SSE and S. It's inconsistent, so you gotta be patient, but when that big groundswell lines up right, it can be magic.
So, long story short: save your energy this week. The window to strike is from Saturday the 19th to Monday the 21st. That’s the one.
Rusty.
Short Range ForecastHeavy rain (total 104mm), heaviest during Tue morning. Warm (max 27°C on Mon morning, min 20°C on Wed afternoon). Winds decreasing (fresh winds from the SSW on Mon afternoon, calm by Tue afternoon). | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Sat night. Warm (max 23°C on Thu morning, min 19°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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) | SSE 7 | S 4 | E 14 | SE 8 | SE 7 | SSE 6 | SE 7 | SE 7 | SE 8 | SSE 8 | SSE 9 | SSE 9 | SSE 15 | SE 15 | SE 16 | SE 15 | SE 14 | SSE 14 | SSE 14 | SSE 14 | S 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4 | 27 | 33 | 33 | 16 | 23 | 12 | 11 | 17 | 7 | 8 | 7 | 23 | 183 | 1210 | 1343 | 1368 | 1411 | 1428 | 1461 | 1922 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | cross-on | off | off | off | off | off | cross-off | off | off | off | off | off | off | off | off | off | off |
High Tide | 6:04PM1.59m | 6:57AM1.46m | 6:27PM1.60m | 7:41AM1.37m | 6:53PM1.58m | 8:36AM1.26m | 7:20PM1.53m | 9:56AM1.15m | 7:47PM1.45m | 8:14PM1.35m | 4:05PM1.31m | 9:47PM1.23m | |||||||||
Low Tide | 12:02PM0.63m | 00:31AM0.32m | 12:25PM0.73m | 1:08AM0.31m | 12:46PM0.84m | 1:50AM0.34m | 1:04PM0.96m | 2:44AM0.40m | 1:07PM1.07m | 4:02AM0.48m | 6:00AM0.52m | 8:47PM1.23m | |||||||||
 |  |  |  |  | |  | |  | | |  |  | |  | | |  |  | | | |
 | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — |
 | — | 5:51 | — | — | 5:50 | — | — | 5:49 | — | — | 5:46 | — | — | 5:45 | — | — | 5:44 | — | — | 5:43 | — |
mm | — | — | 2 | 32 | 6 | 4 | 4 | 22 | 34 | — | — | — | — | — | — | — | 2 | 10 | 6 | — | — |
Temp °C | 27 | 27 | 26 | 23 | 23 | 24 | 21 | 21 | 20 | 23 | 23 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 21 | 21 | 21 |
Feels °C | 26 | 25 | 26 | 23 | 26 | 27 | 20 | 20 | 19 | 20 | 19 | 16 | 16 | 16 | 17 | 17 | 18 | 18 | 19 | 18 | 19 |
Swell 1 Height (m) Direction Period (s) | SSE 7 | SE 10 | SE 9 | SE 8 | SE 7 | SSE 6 | SE 7 | SE 7 | SE 8 | SSE 8 | SSE 9 | SSE 9 | SSE 15 | SE 15 | SE 16 | SE 15 | SE 14 | SSE 14 | SSE 14 | SSE 14 | S 14 |
| kJ | 4 | 15 | 22 | 33 | 14 | 23 | 12 | 11 | 17 | 7 | 8 | 7 | 23 | 183 | 1210 | 1343 | 1368 | 1411 | 1428 | 1461 | 1922 |
Swell 2 Height (m) Direction Period (s) | SE 9 | E 12 | E 14 | E 13 | E 14 | SSW 6 | SSW 6 | SSW 6 | S 5 | SE 7 | SE 7 | SE 9 | SE 8 | SSE 20 | E 9 | E 10 | — | — | — | SE 11 | ESE 10 |
| kJ | 3 | 11 | 33 | 13 | 4 | 3 | 6 | 6 | 2 | 2 | 2 | 3 | 3 | 39 | 7 | 16 | — | — | — | 551 | 340 |
Swell 3 Height (m) Direction Period (s) | S 7 | E 15 | SW 7 | S 7 | E 14 | E 13 | S 9 | S 8 | E 12 | S 5 | — | — | E 10 | SE 8 | — | — | — | — | — | — | E 12 |
| kJ | 1 | 4 | 2 | 1 | 16 | 13 | 2 | 1 | 3 | 1 | — | — | 2 | 3 | — | — | — | — | — | — | 11 |
Wind waves Height (m) Direction Period (s) | SSW 3 | S 4 | SSW 4 | SSW 3 | SSW 4 | — | NE 2 | NE 3 | NNE 3 | NNE 3 | ENE 3 | NE 3 | N 4 | NNE 4 | NNE 4 | N 4 | N 4 | NNE 3 | NNE 3 | N 3 | N 3 |
| kJ | 1 | 27 | 28 | 4 | 5 | — | 1 | 1 | 4 | 7 | 8 | 12 | 17 | 16 | 19 | 14 | 13 | 7 | 5 | 7 | 11 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 90 | 139 | 23 | 34 | 22 | 20 | 42 | 54 | 485 | 142 | 142 | 483 | 225 | 142 | 466 | 506 | 548 | 485 | 34 | 548 | 0 |
Best forecast wave conditions in Kanagawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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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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