Surf Forecasts:
Shichirigahama surf forecast from 11 Sep 2026:
- Most powerful swell: Friday 18 Sep, 3PM (local time) - 5.5ft (1.7m), 17s period, SSE swell with 1,497 kJ wave energy.
Best Forecast Surf Conditions for Shichirigahama this week:
The most powerful waves expected at Shichirigahama in the next 16 days are 1.7m 17s and forecast to arrive on Friday (Sep 18) 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 0.6m 3s period and expected on Friday (Sep 18) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3PM (Fri 18th Sep) | 5.5ft (1.7m) 17s |
Table - best surf conditions forecast for Shichirigahama over the next 16 days.
The Lowdown
Alright, let me look at the charts. Right now, it's a pretty quiet scene around here with only one spot on the radar.
You know, for the next week or so, it’s gonna be a bit of a struggle. From Friday the 11th right through to Wednesday the 16th, it's just tiny and weak. We're looking at waves mostly under 2ft with a combined energy reading struggling to get past 39, so there’s just no power. The water temp is sitting around 82°F, which is a touch warmer than normal for this time of year. That's nice for a dip, but it won't help the surf. You'll see some clean conditions here and there with light offshore breezes, but a knee-high wave is still a knee-high wave. Not worth paddling out for.
Then we hit Thursday the 17th and into Friday morning the 18th. Things stay small, but the period starts to climb. On Friday morning the 18th, we get a 1ft bump from the SE but with a very long 18-second period. The combined energy finally creeps into triple digits at 104, but honestly, it's still pretty ordinary. The real change comes Friday afternoon the 18th. Swell jumps to 3ft from the SSE, period 16 seconds, and the energy shoots up to 486. With a moderate offshore wind from the NE, conditions are clean. It’s surfable, but it’s just the warm-up act.
Now, the standout window. This is what we’re waiting for. Shichirigahama (river) is gonna fire. From Saturday morning the 19th right through to Monday morning the 21st, get ready. Saturday morning the 19th, we’ve got a solid 7ft groundswell out of the SSE, holding a very long 15-second period, pumping 2144 units of energy. That's proper. It's big enough that this is only for experienced surfers. A moderate offshore wind from the NNE is gonna groom it nicely. Sunday the 20th stays thick with 6ft to 7ft swell from the S, still with a long period, and a gentle offshore breeze. But for my money, Monday morning the 21st is the absolute pick of the window. It’s gonna be glassy – zero wind – with an 8ft S swell, period 14 seconds, and a massive 2736 combined energy. That is going to be clean, powerful, and perfect for the experienced crew. The wave direction matches the optimum SSW direction for this break. Keep in mind, with that long period, it might stand up a bit straight on a beach setup, but a river mouth and point setup handle that energy beautifully. The crowds here are sometimes an issue, so get out early for that Monday glass-off.
Monday afternoon the 21st goes a bit sideways as the wind swings onshore and the swell gets to 13ft, making it a total mess.
After that, it backs off. Tuesday the 22nd still has some leftovers – 5ft with moderate offshore wind and 863 energy, still very good fun for the intermediate surfer. But by Wednesday the 23rd, we’re back to tiny waves and poor conditions. The last week of the forecast looks like a write-off with onshore winds and small, jumbled swell.
So, don't bother rushing out this week. The magic is locked in for the 19th through the 21st. If you can handle it, Monday morning the 21st at Shichirigahama is gonna be unreal.
Rusty.
Short Range ForecastHeavy rain (total 45mm), heaviest during Fri morning. Warm (max 25°C on Sun afternoon, min 19°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Wed night. Warm (max 27°C on Mon afternoon, min 22°C on Wed night). Winds decreasing (fresh winds from the S on Mon afternoon, calm by Wed afternoon). | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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) | S 8 | S 8 | SSW 8 | SSW 7 | SSW 7 | SSW 7 | SE 9 | SE 8 | SE 7 | SE 9 | SE 10 | SE 9 | SSE 8 | SE 8 | SE 7 | SSE 7 | SSE 8 | SE 8 | SE 8 | SSE 9 | SSE 21 |
Wave Graph  | |||||||||||||||||||||
 kJ | 28 | 28 | 19 | 18 | 18 | 9 | 13 | 18 | 14 | 19 | 14 | 29 | 40 | 31 | 23 | 19 | 26 | 17 | 9 | 8 | 42 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | cross-on | on | on | on | on | on | on | on | glassy | glassy | cross-off | off | off | cross-off |
High Tide | 5:10PM1.49m | 5:03AM1.54m | 5:25PM1.52m | 5:39AM1.55m | 5:43PM1.56m | 6:17AM1.53m | 6:04PM1.59m | 6:57AM1.46m | 6:27PM1.60m | 7:41AM1.37m | 6:53PM1.58m | 8:36AM1.26m | 7:20PM1.53m | ||||||||
Low Tide | 10:54AM0.39m | 11:05PM0.60m | 11:18AM0.46m | 11:30PM0.48m | 11:40AM0.54m | 11:59PM0.38m | 12:02PM0.63m | 00:31AM0.32m | 12:25PM0.73m | 1:08AM0.31m | 12:46PM0.84m | 1:50AM0.34m | 1:04PM0.96m | 2:44AM0.40m | |||||||
 |  |  |  | |  |  |  |  | | |  | |  |  | | |  | | |  | |
 | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — |
 | — | 5:55 | — | — | 5:53 | — | — | 5:52 | — | — | 5:51 | — | — | 5:50 | — | — | 5:49 | — | — | 5:46 | — |
mm | 20 | 2 | 15 | 6 | 1 | 1 | — | — | — | — | — | — | — | — | 1 | — | 1 | 9 | 3 | 1 | — |
Temp °C | 19 | 20 | 20 | 20 | 21 | 21 | 24 | 25 | 24 | 26 | 27 | 26 | 27 | 27 | 25 | 24 | 24 | 23 | 21 | 21 | 21 |
Feels °C | 20 | 20 | 20 | 20 | 21 | 22 | 26 | 28 | 27 | 27 | 27 | 28 | 28 | 27 | 27 | 28 | 29 | 24 | 20 | 19 | 18 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | SSW 8 | SSW 7 | SSW 7 | SSW 7 | SE 9 | SE 8 | SE 7 | SE 9 | SE 10 | SE 9 | SSE 8 | SE 8 | SE 7 | SSE 7 | SSE 8 | SE 8 | SSE 9 | SSE 9 | SE 8 |
| kJ | 28 | 28 | 19 | 18 | 18 | 9 | 13 | 18 | 14 | 19 | 14 | 29 | 40 | 31 | 23 | 19 | 26 | 17 | 8 | 8 | 11 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SSW 7 | SSW 7 | SW 7 | S 7 | E 12 | S 7 | S 7 | — | E 13 | SE 9 | E 13 | E 12 | SE 8 | ESE 7 | SSE 21 |
| kJ | 4 | 4 | 4 | 4 | 4 | 3 | 5 | 5 | 2 | 1 | 11 | 1 | 1 | — | 13 | 3 | 13 | 3 | 9 | 5 | 42 |
Swell 3 Height (m) Direction Period (s) | S 9 | S 8 | S 8 | S 8 | E 14 | E 13 | E 13 | E 13 | — | E 12 | E 15 | S 7 | S 7 | — | S 7 | — | S 8 | — | E 12 | E 11 | SSE 8 |
| kJ | 1 | 1 | 1 | 1 | 4 | 4 | 3 | 3 | — | 3 | 4 | 1 | 1 | — | 1 | — | 1 | — | 3 | 2 | 7 |
Wind waves Height (m) Direction Period (s) | — | — | NNE 2 | NNE 3 | NNE 2 | NNE 2 | — | — | — | — | S 4 | S 4 | — | S 2 | — | — | — | NE 2 | NNE 3 | N 3 | NNE 3 |
| kJ | — | — | 1 | 1 | 1 | 1 | — | — | — | — | 12 | 7 | — | 1 | — | — | — | 1 | 1 | 5 | 6 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 54 | 58 | 54 | 59 | 54 | 34 | 20 | 20 | 54 | 22 | 81 | 34 | 34 | 81 | 34 | 22 | 20 | 54 | 59 | 142 | 65 |
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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