Shichirigahama Surf Break

Lat Long: 35.30° N 139.51° E

Shichirigahama Surf Forecast and Surf Report

Issued: 8 pm 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Shichirigahama sea temperature is
27.6° C
0.8° 

Shichirigahama surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Shichirigahama surf forecast from 10 Aug 2026:

  • Best quality surf: Sunday 16 Aug, 3AM (local time) - 1.5ft (0.5m), 11s period, S swell with offshore winds.
  • Most powerful swell: Wednesday 12 Aug, 12AM (local time) - 4.5ft (1.4m), 6s period, S swell with 141 kJ wave energy.
  • Next surfable swell (1★+): Sunday 16 Aug, 3AM (local time) - 1.5ft (0.5m), 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 Sunday (Aug 16) at 3AM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.4m and 12s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Shichirigahama in the next 16 days are 1.4m 6s and forecast to arrive on Wednesday (Aug 12) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Tuesday (Aug 11) at 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Sun 16th Aug)1.5ft (0.5m) 11s
Best Surf 3AM (Sun 16th Aug)1.5ft (0.5m) 11s
Most Powerful12AM (Wed 12th Aug)4.5ft (1.4m) 6s

Table - best surf conditions forecast for Shichirigahama over the next 16 days.


The Lowdown

Alright, let’s talk about what’s coming your way. I’ve been staring at the numbers, and honestly, it’s looking like a long, dry spell before we finally see a pulse of life.

For the next two weeks, it’s a desert. From Tuesday the 11th right through until Wednesday the 20th, that’s a full ten-day gap with almost nothing worth paddling for. We’re talking tiny 0.6 to 2ft slop with no push. The combined swell energy is completely weak, barely registering. You’d be spending more time sitting on your board than riding. It’s a rough patch, but these stretches happen around here.

Then, a glimmer. On Thursday the 20th, we get a tiny bump. A 2ft swell from the S, with a period of about 10 seconds, and it's dead calm, glassy conditions. The swell energy climbs to a moderate 101. It’s not much, but it’s the first clean, rideable wave in ages. That glassy morning at Shichigahama (river) is your first real chance to get wet, even if it’s just for a few ankle-biters. It’s inconsistent, and crowds are possible, so you won’t be alone.

Now, the one to circle. Tuesday the 25th. The morning brings a 5ft swell from the SSE with a very long period of 13 seconds. The energy jumps to a strong 671. That’s proper, powerful groundswell. The wind is light onshore, so it won't be perfect, but it’s the biggest push of the whole forecast. For a river break, that long period can make the waves a bit too straight, but there could be a bank holding it together. Shichigahama (river) is your best shout for a real wave, but at that size, it’s for experienced surfers only. The wind cranks onshore to 19 mph in the afternoon, so the morning window is your only chance.

And looking way out to Wednesday the 26th, we see a 4ft SE swell with an 11-second period and glassy, calm wind. The energy is a moderate 286. It could be the cleanest day of the entire forecast, but it's a long way off and always a gamble.

So, the story is simple. A flat spell until the 20th. If you're desperate, that Thursday morning is your only near-term option for clean, tiny waves. For the one real session, you're waiting on the morning of Tuesday the 25th. The water temp is nothing special, just average for this time of year.

Rusty.

Short Range Forecast

Heavy rain (total 27mm), heaviest during Tue night. Warm (max 28°C on Thu morning, min 22°C on Tue night). Winds decreasing (fresh winds from the SE on Tue night, light winds from the NE by Thu afternoon).

Days 5-7 Weather Summary

Heavy rain (total 37mm), heaviest during Sun morning. Warm (max 28°C on Fri morning, min 21°C on Sun morning). Winds decreasing (fresh winds from the NE on Sat afternoon, calm by Sun morning).

Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
SSW
10
0.5
SSW
10
0.5
SSW
11
1.4
S
6
0.5
SSW
10
0.7
SSE
6
0.4
SSW
10
0.5
S
10
0.4
SSW
10
0.4
SSW
9
0.4
SSW
9
0.4
SSW
9
0.4
SSW
9
0.3
SSW
9
0.4
SSW
11
0.4
SSW
10
0.5
S
10
0.4
SSW
10
0.4
SSW
9
Wave Graph
Metric surfscale
Energy kJ
59
62
64
141
58
41
39
50
31
28
28
28
27
15
37
31
55
32
28
Wind (km/h)
20
NE
10
WNW
25
SW
35
SE
10
NNE
20
N
20
N
25
N
15
ENE
15
NNE
25
NNE
25
NE
25
N
25
NNE
25
NE
25
NNE
5
NNW
20
SSW
5
WSW
Wind State
cross-off
cross
cross-on
cross-on
off
off
off
off
cross-off
off
off
cross-off
off
off
off
off
glassy
on
glassy
High Tide
2:44AM1.38m
5:32PM1.44m
3:36AM1.44m
5:45PM1.45m
4:21AM1.49m
5:58PM1.47m
5:02AM1.53m
6:14PM1.49m
5:42AM1.54m
6:33PM1.51m
6:22AM1.51m
6:54PM1.54m
Low Tide
10:13PM1.12m
10:14AM0.18m
10:39PM1.03m
10:47AM0.17m
11:02PM0.93m
11:16AM0.20m
11:27PM0.82m
11:43AM0.25m
11:54PM0.70m
12:09PM0.32m
00:25AM0.60m
12:34PM0.42m
1:01AM0.53m
part cloud
cloud
light rain
heavy rain
light rain
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
thunderstorm
part cloud
cloud
mod rain
light rain
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:56
4:58
4:58
4:58
5:00
5:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:37
6:36
6:35
6:34
6:32
6:31
6:30
 mm
2
22
1
2
3
3
12
7
7
5
7
Temp °C
25
26
26
25
23
25
25
28
28
27
28
28
26
26
28
25
22
24
24
Feels °C
24
25
25
22
24
25
25
29
30
29
29
28
26
25
26
23
24
25
27
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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