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Monbetsu Surf Forecast

Basic // Advanced
◀
6am Sat 20 Sep
1ft N 4kt S
(Knee High)
0.6m @ 9.3s N (11°)
0.2m @ 12.4s ENE (57°)
12pm Sat 20 Sep
1ft+ NNE 11kt ESE
(Knee-Waist High)
0.6m @ 10.8s NNE (14°)
0.2m @ 12s ENE (58°)
6pm Sat 20 Sep
1ft NNE 18kt SE
(Knee High)
0.5m @ 10.9s NNE (16°)
0.7m @ 3.3s ESE (122°)
6am Sun 21 Sep
3ft E 29kt E
(Head High)
4ft South facing beaches
(Overhead)
2.4m @ 6s E (101°)
0.2m @ 10.1s NNE (17°)
12pm Sun 21 Sep
5ft ENE 30kt NE
(1.5x Overhead)
5-6ft North-east facing beaches
(2x Overhead)
3.0m @ 7s ENE (66°)
6pm Sun 21 Sep
6ft NE 26kt NNE
(2x Overhead)
3.1m @ 7.6s NE (44°)
6am Mon 22 Sep
4ft NE 11kt NW
(Overhead)
2.1m @ 8.3s NE (42°)
12pm Mon 22 Sep
3ft NE 10kt W
(Head High)
1.6m @ 8.4s NE (46°)
0.3m @ 3s WNW (285°)
6pm Mon 22 Sep
2ft NE 8kt WNW
(Waist-Shoulder High)
2-3ft North-east facing beaches
(Shoulder-Head High)
1.3m @ 8.4s NE (49°)
0.4m @ 3.1s WNW (301°)

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Sat 6am
Sat 12pm
Sat 6pm
Sun 6am
Sun 12pm
Sun 6pm
Mon 6am
Mon 12pm
Mon 6pm
Wave Height & Swell Direction
Swell Train Data
Wind Speed & Direction
A
S 4kt
A
ESE 11kt
A
SE 18kt
A
E 29kt
A
NE 30kt
A
NNE 26kt
A
NW 11kt
A
W 10kt
A
WNW 8kt
Tide Times & Weather
Cloudy 15°C // 19°C
Windy with rain 14°C // 15°C
Showers easing 15°C // 19°C
▶

Surf Forecast Swell Train Analysis

Date
Surf
Wind
Primary Swell
Secondary Swell
Tertiary Swell
-
Sat 20/09
12am
1ft
WSW 5kt
0.5 m
8.3s 4 (N)
6am
1ft
S 4kt
0.6 m
9.3s 11 (N)
0.2 m
12.4s 57 (ENE)
12pm
1ft+
ESE 11kt
0.6 m
10.8s 14 (NNE)
0.2 m
12s 58 (ENE)
6pm
1ft
SE 18kt
0.5 m
10.9s 16 (NNE)
0.7 m
3.3s 122 (ESE)
+
Sat 20/09
1ft+
ESE 11kt
0.6 m
10.8s 14 (NNE)
0.2 m
12s 58 (ENE)
-
Sun 21/09
12am
1ft+
2-3ft
SF
SE 23kt
1.6 m
4.8s 132 (SE)
0.3 m
10.8s 17 (NNE)
6am
3ft
4ft
SF
E 29kt
2.4 m
6s 101 (E)
0.2 m
10.1s 17 (NNE)
12pm
5ft
5-6ft
NF
NE 30kt
3.0 m
7s 66 (ENE)
6pm
6ft
NNE 26kt
3.1 m
7.6s 44 (NE)
+
Sun 21/09
5ft
5-6ft
NF
NE 30kt
3.0 m
7s 66 (ENE)
-
Mon 22/09
12am
5ft
NNW 18kt
2.6 m
8s 40 (NE)
6am
4ft
NW 11kt
2.1 m
8.3s 42 (NE)
12pm
3ft
W 10kt
1.6 m
8.4s 46 (NE)
0.3 m
3s 285 (WNW)
6pm
2ft
2-3ft
NF
WNW 8kt
1.3 m
8.4s 49 (NE)
0.4 m
3.1s 301 (WNW)
+
Mon 22/09
3ft
W 10kt
1.6 m
8.4s 46 (NE)
0.3 m
3s 285 (WNW)
  • bulletin_datetime_utc => 2025-09-20 00:00:00
  • location_identifier => 276
  • timezone => Asia/Tokyo