Premium ad-free surfcams, dawn surf reports, forecaster notes, long range surf forecasts... Get Swellnet PRO for $7.33 per month Premium ad-free surfcams, dawn surf reports, and more... Get Swellnet PRO for $7.33 per month

Check the 16-day forecast with Swellnet Pro for $8.95/month

Niigata South Surf Forecast

Basic // Advanced
◀
6am Fri 19 Sep
1-2ft NNW 10kt NNE
(Waist High)
1.0m @ 6.1s NNW (343°)
12pm Fri 19 Sep
1ft+ N 11kt NE
(Knee-Waist High)
0.9m @ 5.8s N (354°)
6pm Fri 19 Sep
1ft NNW 13kt NE
(Knee High)
0.7m @ 5.9s NNW (342°)
0.6m @ 3.9s NE (36°)
6am Sat 20 Sep
1ft N 5kt ESE
(Knee High)
0.7m @ 5.7s N (359°)
12pm Sat 20 Sep
1ft N 13kt ESE
(Knee High)
0.5m @ 5.5s N (354°)
0.2m @ 2.3s E (83°)
6pm Sat 20 Sep
1ft SW 20kt SW
(Knee High)
1.1m @ 5.5s SW (232°)
0.2m @ 5.7s N (352°)
6am Sun 21 Sep
1-2ft NNW 14kt NW
(Waist High)
1.1m @ 5.2s NNW (332°)
0.6m @ 6.1s WSW (248°)
12pm Sun 21 Sep
2-3ft NNW 12kt NNW
(Shoulder-Head High)
1.5m @ 6.3s NNW (342°)
0.4m @ 6.2s WSW (252°)
6pm Sun 21 Sep
2-3ft N 10kt N
(Shoulder-Head High)
1.7m @ 6.9s N (349°)
0.2m @ 6.1s WSW (254°)

This is premium content for Swellnet Pro subscribers WHY?

Become a subscriber and receive access to ad-free 16 day surf forecasts and charts, detailed surf forecaster notes, dawn surf reports and premium, ad-free surfcams and replays.

Get Swellnet Pro
Fri 6am
Fri 12pm
Fri 6pm
Sat 6am
Sat 12pm
Sat 6pm
Sun 6am
Sun 12pm
Sun 6pm
Wave Height & Swell Direction
Swell Train Data
Wind Speed & Direction
A
NNE 10kt
A
NE 11kt
A
NE 13kt
A
ESE 5kt
A
ESE 13kt
A
SW 20kt
A
NW 14kt
A
NNW 12kt
A
N 10kt
Tide Times & Weather
Possible shower 20°C // 24°C
Heavy rain 21°C // 26°C
Showers 21°C // 22°C
▶

Surf Forecast Swell Train Analysis

Date
Surf
Wind
Primary Swell
Secondary Swell
Tertiary Swell
-
Fri 19/09
12am
1-2ft
NNE 11kt
1.1 m
6.2s 341 (NNW)
6am
1-2ft
NNE 10kt
1.0 m
6.1s 343 (NNW)
12pm
1ft+
NE 11kt
0.9 m
5.8s 354 (N)
6pm
1ft
NE 13kt
0.7 m
5.9s 342 (NNW)
0.6 m
3.9s 36 (NE)
+
Fri 19/09
1ft+
NE 11kt
0.9 m
5.8s 354 (N)
-
Sat 20/09
12am
1ft
E 7kt
0.8 m
5.8s 353 (N)
0.4 m
4.2s 69 (ENE)
6am
1ft
ESE 5kt
0.7 m
5.7s 359 (N)
12pm
1ft
ESE 13kt
0.5 m
5.5s 354 (N)
0.2 m
2.3s 83 (E)
6pm
1ft
SW 20kt
1.1 m
5.5s 232 (SW)
0.2 m
5.7s 352 (N)
+
Sat 20/09
1ft
ESE 13kt
0.5 m
5.5s 354 (N)
0.2 m
2.3s 83 (E)
-
Sun 21/09
12am
1ft+
NW 12kt
1.1 m
6s 255 (WSW)
0.2 m
5.5s 339 (NNW)
6am
1-2ft
NW 14kt
1.1 m
5.2s 332 (NNW)
0.6 m
6.1s 248 (WSW)
12pm
2-3ft
NNW 12kt
1.5 m
6.3s 342 (NNW)
0.4 m
6.2s 252 (WSW)
6pm
2-3ft
N 10kt
1.7 m
6.9s 349 (N)
0.2 m
6.1s 254 (WSW)
+
Sun 21/09
2-3ft
NNW 12kt
1.5 m
6.3s 342 (NNW)
0.4 m
6.2s 252 (WSW)
  • bulletin_datetime_utc => 2025-09-19 00:00:00
  • location_identifier => 258
  • timezone => Asia/Tokyo