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Iwanai Surf Forecast

Basic // Advanced
◀
6am Mon 15 Sep
0.5ft NNE 13kt SSW
(Ankle High)
0.3m @ 5.3s NNE (16°)
0.4m @ 7.2s SW (219°)
0.2m @ 4.2s WSW (252°)
12pm Mon 15 Sep
1ft SW 21kt SSW
(Knee High)
0.9m @ 3.7s SW (221°)
0.4m @ 7s SW (222°)
6pm Mon 15 Sep
2ft SW 21kt SW
(Waist-Shoulder High)
1.9m @ 6s SW (236°)
6am Tue 16 Sep
2ft W 11kt WNW
(Waist-Shoulder High)
1.4m @ 6.2s W (266°)
12pm Tue 16 Sep
1-2ft W 14kt WSW
(Waist High)
1.2m @ 5.9s W (269°)
6pm Tue 16 Sep
1ft W 16kt SSW
(Knee High)
0.8m @ 5.7s W (269°)
0.6m @ 3.8s SW (229°)
6am Wed 17 Sep
1ft+ SW 25kt SSW
(Knee-Waist High)
1.6m @ 5.2s SW (224°)
12pm Wed 17 Sep
2ft W 15kt WNW
(Waist-Shoulder High)
1.4m @ 5.8s W (273°)
6pm Wed 17 Sep
2-3ft WNW 14kt WNW
(Shoulder-Head High)
1.6m @ 6s WNW (291°)

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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
SSW 13kt
A
SSW 21kt
A
SW 21kt
A
WNW 11kt
A
WSW 14kt
A
SSW 16kt
A
SSW 25kt
A
WNW 15kt
A
WNW 14kt
Tide Times & Weather
Mostly sunny 17°C // 26°C
Mostly sunny 18°C // 25°C
Rain 18°C // 22°C
▶

Surf Forecast Swell Train Analysis

Date
Surf
Wind
Primary Swell
Secondary Swell
Tertiary Swell
-
Mon 15/09
12am
1ft
SSW 11kt
0.6 m
5.6s 11 (N)
0.3 m
6.9s 354 (N)
6am
0.5ft
SSW 13kt
0.3 m
5.3s 16 (NNE)
0.4 m
7.2s 219 (SW)
0.2 m
4.2s 252 (WSW)
12pm
1ft
SSW 21kt
0.9 m
3.7s 221 (SW)
0.4 m
7s 222 (SW)
6pm
2ft
SW 21kt
1.9 m
6s 236 (SW)
+
Mon 15/09
1ft
SSW 21kt
0.9 m
3.7s 221 (SW)
0.4 m
7s 222 (SW)
-
Tue 16/09
12am
1-2ft
W 11kt
1.5 m
6.2s 248 (WSW)
0.7 m
7.5s 270 (W)
6am
2ft
WNW 11kt
1.4 m
6.2s 266 (W)
12pm
1-2ft
WSW 14kt
1.2 m
5.9s 269 (W)
6pm
1ft
SSW 16kt
0.8 m
5.7s 269 (W)
0.6 m
3.8s 229 (SW)
+
Tue 16/09
1-2ft
WSW 14kt
1.2 m
5.9s 269 (W)
-
Wed 17/09
12am
0.5ft
S 16kt
0.4 m
4.6s 243 (WSW)
0.7 m
3.9s 202 (SSW)
6am
1ft+
SSW 25kt
1.6 m
5.2s 224 (SW)
12pm
2ft
WNW 15kt
1.4 m
5.8s 273 (W)
6pm
2-3ft
WNW 14kt
1.6 m
6s 291 (WNW)
+
Wed 17/09
2ft
WNW 15kt
1.4 m
5.8s 273 (W)
  • bulletin_datetime_utc => 2025-09-15 06:00:00
  • location_identifier => 283
  • timezone => Asia/Tokyo