Sagami River surfForecast / Kanagawa / Japan

information circle16 Day Weather and Surf, issued 8 pm Sunday 31 May 2026 JST
Forecast update in hr  min  s Forecast update imminent
Sagami River surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Sagami River sea temperature is
20.7° C
(Which is 1.1°C colder than average for this time of year)

Sagami River surf forecast from 31 May 2026:

  • Best quality surf: Monday 1 Jun, 3AM (local time) - 2.5ft (0.7m), 11s period, S swell with cross-offshore winds.
  • Most powerful swell: Wednesday 3 Jun, 6PM (local time) - 8ft (2.5m), 16s period, SSW swell with 3,035 kJ wave energy.
  • Next surfable swell (1★+): Monday 1 Jun, 3AM (local time) - 2.5ft (0.7m), 11s period with S swell.

Best Forecast Surf Conditions for Sagami River this week:

The surf forecast for Sagami River over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Jun 01) at 3AM. The primary swell is predicted to be 0.7m and 11s period with a secondary swell of 0.7m and 5s. Another secondary swell of 0.9m and 5s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Sagami River in the next 16 days are 2.5m 16s and forecast to arrive on Wednesday (Jun 03) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 6s period and expected on Wednesday (Jun 03) at 6PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Mon 1st Jun)2.5ft (0.7m) 11s
Best Surf 3AM (Mon 1st Jun)2.5ft (0.7m) 11s
Most Powerful 6PM (Wed 3rd Jun)8ft (2.5m) 16s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 166mm), heaviest during Wed morning. Warm (max 24°C on Mon morning, min 17°C on Wed afternoon). Winds increasing (calm on Tue night, near gales from the NNE by Wed afternoon).

Days 5-7 Weather Summary

Moderate rain (total 15mm), heaviest on Wed night. Warm (max 23°C on Fri morning, min 18°C on Wed night). Winds decreasing (near gales from the N on Wed night, calm by Fri night).

Monday
1
Tuesday
2
Wednesday
3
Thursday
4
Friday
5
Saturday
6
Sun
7
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
0
0
0
0
0
0
0
1
0
2
1
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
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
S
12
0.6
S
11
0.9
S
10
0.9
SSW
13
0.8
SSW
12
0.9
SSW
13
0.7
SSW
12
2.3
SE
7
2.4
SSE
10
1.5
SSW
13
0.9
SSW
10
0.7
S
9
0.5
S
8
0.4
SSW
8
0.3
SSW
7
0.2
SSW
7
0.2
S
7
0.2
S
7
0.2
E
14
0.4
SE
5
1
SE
6
Wave Graph
Metric surfscale
Energy kJ
132
86
158
238
189
238
127
522
1086
711
177
81
34
19
11
5
5
5
16
7
74
Wind (km/h)
15
WSW
5
SE
20
S
20
SSW
20
S
25
S
15
S
15
ENE
50
NE
45
NNW
25
N
15
NE
15
N
25
NNE
20
ENE
5
E
10
ESE
20
S
15
SSW
10
S
20
S
cross
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross
glassy
cross-on
on
cross-on
cross-on
on
High Tide
3:56AM1.45m
6:19PM1.37m
4:28AM1.45m
6:56PM1.35m
5:02AM1.45m
7:33PM1.33m
5:37AM1.42m
8:12PM1.31m
6:14AM1.37m
8:53PM1.30m
6:57AM1.30m
9:35PM1.30m
7:51AM1.21m
Low Tide
10:40PM0.97m
11:10AM0.11m
11:12PM0.98m
11:45AM0.12m
11:45PM0.99m
12:21PM0.15m
00:21AM0.99m
12:57PM0.20m
1:03AM0.99m
1:35PM0.26m
1:54AM0.99m
2:15PM0.34m
2:59AM0.96m
2:58PM0.43m
clear
clear
clear
part cloud
cloud
cloud
heavy rain
heavy rain
heavy rain
heavy rain
part cloud
cloud
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:28
4:28
4:28
4:28
4:28
4:26
4:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:50
6:51
6:52
6:52
6:52
6:52
6:53
6:53
18
73
75
15
Temp °C
23
24
23
21
22
21
21
18
17
19
21
21
19
23
23
19
20
21
20
22
22
21
24
21
19
20
19
20
17
10
14
18
19
17
19
19
18
19
19
20
22
20
Swell 1
Height (m)
Direction
Period (s)
0.7
S
12
0.6
S
11
0.6
SSW
14
0.9
SSW
13
0.8
SSW
12
0.9
SSW
13
0.7
SSW
12
1.3
SSE
7
2.4
SSE
10
1.5
SSE
11
0.9
SSW
10
0.7
S
9
0.5
S
8
0.4
SSW
8
0.3
SSW
7
0.2
SSW
7
0.2
S
7
0.2
S
7
0.1
S
7
0.4
SE
5
0.6
SSE
6
Energy kJ
132
86
145
238
189
238
127
153
1086
511
177
81
34
19
11
5
4
4
1
7
23
Swell 2
Height (m)
Direction
Period (s)
0.1
SE
12
0.5
S
5
0.1
SE
11
0.2
SSW
18
0.6
SSW
14
0.1
SE
11
0.6
S
6
0.5
SW
13
0.7
SW
16
1.5
SSW
13
0.5
SE
10
0.4
SE
9
0.3
SE
8
0.1
SE
8
0.1
SE
8
0.1
SE
7
0.1
SE
11
0.1
SE
10
0.1
S
6
0.1
S
8
Energy kJ
5
14
5
31
138
5
24
80
236
711
44
21
11
2
2
2
5
4
1
1
Swell 3
Height (m)
Direction
Period (s)
0.2
ESE
10
0.3
SSW
14
0.2
E
9
0.1
SE
11
0.1
SE
11
0.1
S
15
0.1
SE
11
0.1
SE
11
0.4
SSW
20
1.1
S
10
0.7
S
9
0.1
SE
13
0.1
SE
12
0.1
SE
7
0.1
SE
11
0.1
E
7
0.2
E
14
0.1
SE
10
0.1
SE
10
Energy kJ
9
39
7
5
5
4
5
5
158
214
78
7
5
2
5
1
16
4
4
Wind waves
Height (m)
Direction
Period (s)
0.8
SSW
5
0.5
SSW
5
0.9
S
10
0.7
SSW
4
0.5
S
3
2.3
SE
7
1.6
NE
5
1
N
5
0.3
NNE
3
0.4
NE
3
0.1
SE
4
0.3
SE
4
1
SE
6
Energy kJ
28
15
158
18
6
522
130
54
1
3
1
3
74
Nearest Offshore or Glassy
Rating
(10 max)
1
2
4
3
2
2
2
4
4
2
2
1
1
1
1
1
1
1
2
3
1
Distance (km)
3
35
475
84
94
94
64
779
494
454
22
23
22
132
52
52
32
64
84
537
43
Best forecast wave conditions in Kanagawa
Rating
(10 max)
1
2
2
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
3
4
4
4
4
4
2
4
4
2
3
2
1
1
1
4
1
1
3
3
2
Header Global
Rating
(10 max)
6
5
4
5
5
5
4
5
4
5
5
5
6
5
5
9
9
8
9
9
8
  • Map Icons:
  • Break
  • 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 Sagami River Surf forecast

The above surf forecast table for Sagami River provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sagami River can be found by selecting the local surf guide option on the grey menu. Our Sagami River 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 (Sagami River) 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 Sagami River 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.

Sagami River is 4 km (2 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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