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Monbetsu Surf Forecast
◀
6am Wed 20 Aug
Flat
6kt WSW
12pm Wed 20 Aug
Flat
5kt E
6pm Wed 20 Aug
Flat
6kt ESE
6am Thu 21 Aug
Flat
12kt NNE
12pm Thu 21 Aug
0.5ft NNE
11kt N
(Ankle High)
0.4m @ 3.1s NNE (19°)
6pm Thu 21 Aug
1ft NNE
5kt NE
(Knee High)
0.5m @ 3.8s NNE (25°)
6am Fri 22 Aug
1ft NE
7kt SSE
(Knee High)
0.4m @ 4.3s NE (40°)
12pm Fri 22 Aug
0.5ft NE
9kt SE
(Ankle High)
0.3m @ 4.4s NE (45°)
6pm Fri 22 Aug
0.5ft NE
9kt ESE
(Ankle High)
0.3m @ 4.4s NE (48°)
Wed
6am
Wed
12pm
Wed
6pm
Thu
6am
Thu
12pm
Thu
6pm
Fri
6am
Fri
12pm
Fri
6pm
Wave Height & Swell Direction
Swell Train Data
Wind Speed & Direction
A
WSW
6kt
A
E
5kt
A
ESE
6kt
A
NNE
12kt
A
N
11kt
A
NE
5kt
A
SSE
7kt
A
SE
9kt
A
ESE
9kt
Tide Times & Weather
21°C // 22°C
20°C // 22°C
19°C // 22°C
▶
Surf Forecast Swell Train Analysis
Date
Surf
Wind
Primary Swell
Secondary Swell
Tertiary Swell
-
Wed
20/08
12am
Flat
0.5ft
SF
W
12kt
0.2
m
4.2s
120 (ESE)
0.2
m
2.9s
186 (S)
6am
Flat
WSW
6kt
12pm
Flat
E
5kt
6pm
Flat
ESE
6kt
Wed
20/08
Flat
E
5kt
-
Thu
21/08
12am
Flat
SE
5kt
6am
Flat
NNE
12kt
12pm
0.5ft
N
11kt
0.4
m
3.1s
19 (NNE)
6pm
1ft
NE
5kt
0.5
m
3.8s
25 (NNE)
Thu
21/08
0.5ft
N
11kt
0.4
m
3.1s
19 (NNE)
-
Fri
22/08
12am
1ft
S
3kt
0.4
m
4.1s
33 (NNE)
6am
1ft
SSE
7kt
0.4
m
4.3s
40 (NE)
12pm
0.5ft
SE
9kt
0.3
m
4.4s
45 (NE)
6pm
0.5ft
ESE
9kt
0.3
m
4.4s
48 (NE)
Fri
22/08
0.5ft
SE
9kt
0.3
m
4.4s
45 (NE)
- bulletin_datetime_utc => 2025-08-19 12:00:00
- location_identifier => 276
- timezone => Asia/Tokyo