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Rio Sieira Surf Forecast

Basic // Advanced
◀
6am Sat 16 Aug
2ft NW 4kt WSW
(Waist-Shoulder High)
1.2m @ 9.3s NW (304°)
0.2m @ 13.6s SSW (207°)
0.3m @ 6.1s NNE (28°)
12pm Sat 16 Aug
2ft NW 2kt W
(Waist-Shoulder High)
1.2m @ 9.2s NW (304°)
0.2m @ 13.4s SSW (207°)
0.3m @ 6.3s NNE (27°)
6pm Sat 16 Aug
2ft NW 6kt NNW
(Waist-Shoulder High)
1.1m @ 9s NW (305°)
0.2m @ 13.4s SSW (207°)
0.3m @ 6.3s NNE (27°)
6am Sun 17 Aug
1-2ft NW 8kt N
(Waist High)
0.9m @ 8.4s NW (306°)
0.2m @ 13.2s SSW (207°)
0.2m @ 6.9s NNE (22°)
12pm Sun 17 Aug
1ft+ NW 7kt NNW
(Knee-Waist High)
0.7m @ 8.2s NW (306°)
0.2m @ 12.6s SSW (208°)
0.2m @ 6.9s NNE (21°)
6pm Sun 17 Aug
1ft NW 8kt NW
(Knee High)
0.5m @ 7.8s NW (308°)
0.2m @ 6.1s WSW (253°)
0.2m @ 12.3s SSW (208°)
6am Mon 18 Aug
1ft WSW 6kt NNW
(Knee High)
0.5m @ 6.2s WSW (255°)
0.3m @ 7.4s NW (310°)
0.3m @ 6.8s NNE (25°)
12pm Mon 18 Aug
1ft W 9kt NNW
(Knee High)
0.5m @ 6.4s W (266°)
0.3m @ 6.9s NNE (24°)
6pm Mon 18 Aug
1ft W 12kt NNW
(Knee High)
0.5m @ 6.1s W (264°)
0.3m @ 6.7s NNE (25°)

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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
WSW 4kt
A
W 2kt
A
NNW 6kt
A
N 8kt
A
NNW 7kt
A
NW 8kt
A
NNW 6kt
A
NNW 9kt
A
NNW 12kt
Tide Times & Weather
Mostly sunny 17°C // 22°C
Mostly cloudy 17°C // 22°C
Mostly cloudy 16°C // 22°C
▶

Surf Forecast Swell Train Analysis

Date
Surf
Wind
Primary Swell
Secondary Swell
Tertiary Swell
-
Sat 16/08
12am
2ft
SSW 5kt
1.2 m
9.6s 305 (NW)
0.3 m
14.3s 207 (SSW)
0.4 m
3.6s 203 (SSW)
6am
2ft
WSW 4kt
1.2 m
9.3s 304 (NW)
0.2 m
13.6s 207 (SSW)
0.3 m
6.1s 28 (NNE)
12pm
2ft
W 2kt
1.2 m
9.2s 304 (NW)
0.2 m
13.4s 207 (SSW)
0.3 m
6.3s 27 (NNE)
6pm
2ft
NNW 6kt
1.1 m
9s 305 (NW)
0.2 m
13.4s 207 (SSW)
0.3 m
6.3s 27 (NNE)
+
Sat 16/08
2ft
W 2kt
1.2 m
9.2s 304 (NW)
0.2 m
13.4s 207 (SSW)
0.3 m
6.3s 27 (NNE)
-
Sun 17/08
12am
1-2ft
N 8kt
1.0 m
8.6s 306 (NW)
0.2 m
13.3s 207 (SSW)
0.2 m
6.9s 23 (NNE)
6am
1-2ft
N 8kt
0.9 m
8.4s 306 (NW)
0.2 m
13.2s 207 (SSW)
0.2 m
6.9s 22 (NNE)
12pm
1ft+
NNW 7kt
0.7 m
8.2s 306 (NW)
0.2 m
12.6s 208 (SSW)
0.2 m
6.9s 21 (NNE)
6pm
1ft
NW 8kt
0.5 m
7.8s 308 (NW)
0.2 m
6.1s 253 (WSW)
0.2 m
12.3s 208 (SSW)
+
Sun 17/08
1ft+
NNW 7kt
0.7 m
8.2s 306 (NW)
0.2 m
12.6s 208 (SSW)
0.2 m
6.9s 21 (NNE)
-
Mon 18/08
12am
1ft
N 7kt
0.4 m
7.5s 307 (NW)
0.4 m
6.1s 254 (WSW)
0.3 m
6.7s 25 (NNE)
6am
1ft
NNW 6kt
0.5 m
6.2s 255 (WSW)
0.3 m
7.4s 310 (NW)
0.3 m
6.8s 25 (NNE)
12pm
1ft
NNW 9kt
0.5 m
6.4s 266 (W)
0.3 m
6.9s 24 (NNE)
6pm
1ft
NNW 12kt
0.5 m
6.1s 264 (W)
0.3 m
6.7s 25 (NNE)
+
Mon 18/08
1ft
NNW 9kt
0.5 m
6.4s 266 (W)
0.3 m
6.9s 24 (NNE)
  • bulletin_datetime_utc => 2025-08-15 18:00:00
  • location_identifier => 421
  • timezone => Europe/Madrid