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Iwanai Surf Forecast

6am Mon 22 Sep
1ft+ N 8kt NNW
(Knee-Waist High)
1-2ft North-east facing beaches
(Waist High)
1.0m @ 6s N (6°)
12pm Mon 22 Sep
1ft N 10kt W
(Knee High)
0.7m @ 5.1s N (355°)
6pm Mon 22 Sep
1ft NNW 7kt W
(Knee High)
0.6m @ 4.2s NNW (332°)
6am Tue 23 Sep
0.5ft NNW 2kt ESE
(Ankle High)
0.3m @ 4.2s NNW (332°)
12pm Tue 23 Sep
0.5ft N 2kt S
(Ankle High)
0.2m @ 4.3s N (349°)
0.2m @ 4s WNW (292°)
6pm Tue 23 Sep
0.5ft WNW 1kt N
(Ankle High)
0.2m @ 4.1s WNW (294°)
6am Wed 24 Sep
Flat 8kt SE
12pm Wed 24 Sep
Flat 15kt SSE
(Flat)
0.2m @ 2.3s SE (145°)
6pm Wed 24 Sep
Flat 19kt SE
(Flat)
Flat South facing beaches
(Knee High)
1.1m @ 4.1s SE (145°)

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Mon 6am
Mon 12pm
Mon 6pm
Tue 6am
Tue 12pm
Tue 6pm
Wed 6am
Wed 12pm
Wed 6pm
Wave Height & Swell Direction
Swell Train Data
Wind Speed & Direction
A
NNW 8kt
A
W 10kt
A
W 7kt
A
ESE 2kt
A
S 2kt
A
N 1kt
A
SE 8kt
A
SSE 15kt
A
SE 19kt
Tide Times & Weather
Clearing shower 11°C // 20°C
Mostly cloudy 11°C // 20°C
Mostly cloudy 11°C // 21°C

Surf Forecast Swell Train Analysis

Date
Surf
Wind
Primary Swell
Secondary Swell
Tertiary Swell
-
Mon 22/09
12am
2ft
N 11kt
1.4 m
6.5s 10 (N)
6am
1ft+
1-2ft
NF
NNW 8kt
1.0 m
6s 6 (N)
12pm
1ft
W 10kt
0.7 m
5.1s 355 (N)
6pm
1ft
W 7kt
0.6 m
4.2s 332 (NNW)
+
Mon 22/09
1ft
W 10kt
0.7 m
5.1s 355 (N)
-
Tue 23/09
12am
1ft
WNW 6kt
0.4 m
4.2s 332 (NNW)
6am
0.5ft
ESE 2kt
0.3 m
4.2s 332 (NNW)
12pm
0.5ft
S 2kt
0.2 m
4.3s 349 (N)
0.2 m
4s 292 (WNW)
6pm
0.5ft
N 1kt
0.2 m
4.1s 294 (WNW)
+
Tue 23/09
0.5ft
S 2kt
0.2 m
4.3s 349 (N)
0.2 m
4s 292 (WNW)
-
Wed 24/09
12am
0.5ft
SE 5kt
0.2 m
4.1s 291 (WNW)
6am
Flat
SE 8kt
12pm
Flat
SSE 15kt
0.2 m
2.3s 145 (SE)
6pm
Flat
1ft
SF
SE 19kt
1.1 m
4.1s 145 (SE)
+
Wed 24/09
Flat
SSE 15kt
0.2 m
2.3s 145 (SE)
  • bulletin_datetime_utc => 2025-09-21 06:00:00
  • location_identifier => 283
  • timezone => Asia/Tokyo