Daily Superforecast
asLast update: 01:38 local time
Thursday, Nov 21
Wind
Weather
Waves
Tides
173°
S
00h
17 kts
max 33 kts
0.17 mm
13° C
13
87%
1017 hpa
3.0 m
12 s
0.3 m
178°
S
01h
14 kts
max 32 kts
14° C
14
85%
1016 hpa
3.0 m
11 s
0.6 m
180°
S
02h
14 kts
max 34 kts
0.07 mm
14° C
14
85%
1016 hpa
3.0 m
11 s
0.9 m
178°
S
03h
15 kts
max 36 kts
0.2 mm
14° C
14
86%
1017 hpa
3.0 m
10 s
1.2 m
179°
S
04h
16 kts
max 35 kts
0.12 mm
14° C
14
87%
1017 hpa
3.1 m
10 s
1.4 m
178°
S
05h
16 kts
max 32 kts
0.06 mm
14° C
14
87%
1017 hpa
3.0 m
9 s
05:06
1.5 m
173°
S
06h
15 kts
max 32 kts
0.12 mm
14° C
14
88%
1017 hpa
3.0 m
9 s
1.4 m
173°
S
07h
15 kts
max 31 kts
0.28 mm
14° C
14
88%
1018 hpa
2.9 m
9 s
1.3 m
172°
S
08h
14 kts
max 26 kts
0.2 mm
13° C
13
88%
1018 hpa
2.9 m
9 s
1.2 m
174°
S
09h
13 kts
max 25 kts
0.13 mm
13° C
13
88%
1018 hpa
2.9 m
8 s
1.1 m
179°
S
10h
11 kts
max 23 kts
0.22 mm
14° C
14
90%
1018 hpa
2.9 m
8 s
09:56
1.0 m
183°
S
11h
11 kts
max 27 kts
0.17 mm
14° C
14
89%
1017 hpa
2.8 m
8 s
1.1 m
188°
S
12h
11 kts
max 29 kts
0.05 mm
14° C
14
89%
1017 hpa
2.7 m
8 s
1.2 m
193°
SSW
13h
11 kts
max 28 kts
15° C
15
87%
1017 hpa
2.7 m
8 s
1.4 m
193°
SSW
14h
10 kts
max 27 kts
15° C
15
87%
1016 hpa
2.6 m
8 s
1.5 m
195°
SSW
15h
10 kts
max 28 kts
15° C
15
87%
1016 hpa
2.6 m
8 s
15:07
1.6 m
193°
SSW
16h
11 kts
max 28 kts
14° C
14
88%
1016 hpa
2.5 m
8 s
1.5 m
190°
S
17h
10 kts
max 27 kts
14° C
14
89%
1016 hpa
2.5 m
8 s
1.3 m
186°
S
18h
10 kts
max 27 kts
14° C
14
89%
1016 hpa
2.4 m
8 s
1.0 m
179°
S
19h
10 kts
max 27 kts
14° C
14
90%
1017 hpa
2.4 m
8 s
0.7 m
176°
S
20h
10 kts
max 24 kts
14° C
14
90%
1017 hpa
2.3 m
8 s
0.4 m
177°
S
21h
9 kts
max 22 kts
14° C
14
90%
1017 hpa
2.3 m
7 s
0.1 m
173°
S
22h
9 kts
max 20 kts
13° C
13
90%
1016 hpa
2.2 m
7 s
22:21
172°
S
23h
9 kts
max 20 kts
13° C
13
91%
1016 hpa
2.2 m
7 s
0.0 m
Friday, Nov 22
Wind
Weather
Waves
Tides
169°
S
00h
9 kts
max 20 kts
13° C
13
91%
1016 hpa
2.2 m
7 s
0.2 m
167°
SSE
01h
9 kts
max 20 kts
13° C
13
91%
1016 hpa
2.2 m
7 s
0.4 m
164°
SSE
02h
10 kts
max 19 kts
13° C
13
90%
1015 hpa
2.2 m
8 s
0.7 m
167°
SSE
03h
9 kts
max 18 kts
13° C
13
90%
1014 hpa
2.3 m
8 s
1.0 m
168°
SSE
04h
9 kts
max 18 kts
13° C
13
91%
1014 hpa
2.3 m
8 s
1.2 m
176°
S
05h
8 kts
max 20 kts
13° C
13
91%
1014 hpa
2.3 m
8 s
1.4 m
183°
S
06h
9 kts
max 29 kts
13° C
13
88%
1014 hpa
2.4 m
9 s
06:00
1.5 m
182°
S
07h
9 kts
max 30 kts
13° C
13
85%
1014 hpa
2.4 m
9 s
1.4 m
181°
S
08h
10 kts
max 30 kts
0.1 mm
13° C
13
86%
1014 hpa
2.5 m
9 s
1.3 m
194°
SSW
09h
11 kts
max 32 kts
1.1 mm
13° C
13
89%
1015 hpa
2.5 m
9 s
1.1 m
183°
S
10h
14 kts
max 32 kts
1.11 mm
13° C
13
87%
1014 hpa
2.6 m
9 s
1.0 m
174°
S
11h
16 kts
max 32 kts
2.82 mm
12° C
12
91%
1014 hpa
2.6 m
9 s
11:17
0.9 m
175°
S
12h
16 kts
max 32 kts
0.65 mm
13° C
13
89%
1013 hpa
2.6 m
10 s
1.0 m
175°
S
13h
14 kts
max 26 kts
1.61 mm
13° C
13
94%
1013 hpa
2.6 m
10 s
1.1 m
179°
S
14h
11 kts
max 27 kts
3.5 mm
13° C
13
95%
1012 hpa
2.5 m
10 s
1.2 m
199°
SSW
15h
11 kts
max 30 kts
1.81 mm
13° C
13
94%
1012 hpa
2.4 m
10 s
1.3 m
208°
SSW
16h
12 kts
max 32 kts
2.31 mm
13° C
13
93%
1011 hpa
2.4 m
10 s
16:17
1.4 m
201°
SSW
17h
12 kts
max 32 kts
1.73 mm
13° C
13
92%
1011 hpa
2.3 m
10 s
1.4 m
207°
SSW
18h
14 kts
max 32 kts
1.48 mm
13° C
13
93%
1011 hpa
2.2 m
10 s
1.2 m
232°
SW
19h
12 kts
max 29 kts
2.11 mm
13° C
13
95%
1011 hpa
2.2 m
10 s
1.0 m
277°
W
20h
9 kts
max 13 kts
2.69 mm
12° C
12
95%
1012 hpa
2.1 m
10 s
0.7 m
279°
W
21h
5 kts
max 8 kts
1.06 mm
11° C
11
94%
1013 hpa
2.1 m
10 s
0.4 m
260°
W
22h
4 kts
max 5 kts
0.15 mm
11° C
11
92%
1013 hpa
2.1 m
10 s
0.2 m
266°
W
23h
1 kts
max 2 kts
0.13 mm
11° C
11
94%
1012 hpa
2.0 m
10 s
23:18
0.1 m
Saturday, Nov 23
Wind
Weather
Waves
Tides
185°
S
00h
4 kts
max 14 kts
11° C
11
95%
1012 hpa
2.0 m
10 s
0.2 m
202°
SSW
01h
7 kts
max 18 kts
0.06 mm
12° C
12
96%
1012 hpa
1.9 m
10 s
0.3 m
198°
SSW
02h
6 kts
max 17 kts
12° C
12
94%
1012 hpa
1.9 m
9 s
0.5 m
214°
SW
03h
9 kts
max 23 kts
12° C
12
94%
1012 hpa
1.9 m
9 s
0.8 m
236°
SW
04h
14 kts
max 23 kts
0.2 mm
12° C
12
94%
1013 hpa
1.8 m
9 s
1.1 m
247°
WSW
05h
14 kts
max 22 kts
12° C
12
90%
1013 hpa
1.8 m
9 s
1.3 m
255°
WSW
06h
13 kts
max 18 kts
0.06 mm
12° C
12
89%
1014 hpa
1.8 m
9 s
1.5 m
258°
WSW
07h
11 kts
max 17 kts
12° C
12
90%
1014 hpa
1.7 m
9 s
06:47
1.5 m
259°
W
08h
13 kts
max 16 kts
11° C
11
87%
1015 hpa
1.7 m
9 s
1.4 m
248°
WSW
09h
11 kts
max 14 kts
11° C
11
86%
1016 hpa
1.7 m
9 s
1.3 m
249°
WSW
10h
9 kts
max 12 kts
12° C
12
83%
1016 hpa
1.6 m
9 s
1.1 m
238°
WSW
11h
7 kts
max 11 kts
12° C
12
82%
1014 hpa
1.6 m
9 s
0.9 m
241°
WSW
12h
7 kts
max 10 kts
12° C
12
81%
1014 hpa
1.6 m
9 s
12:28
0.8 m
244°
WSW
13h
7 kts
max 10 kts
12° C
12
81%
1014 hpa
1.6 m
9 s
0.8 m
248°
WSW
14h
7 kts
max 10 kts
12° C
12
79%
1014 hpa
1.5 m
9 s
0.9 m
251°
WSW
15h
6 kts
max 9 kts
12° C
12
77%
1014 hpa
1.5 m
8 s
1.0 m
254°
WSW
16h
6 kts
max 8 kts
12° C
12
75%
1014 hpa
1.4 m
8 s
1.2 m
252°
WSW
17h
5 kts
max 7 kts
11° C
11
75%
1014 hpa
1.4 m
8 s
1.3 m
250°
WSW
18h
5 kts
max 6 kts
11° C
11
74%
1015 hpa
1.4 m
8 s
17:36
1.3 m
247°
WSW
19h
4 kts
max 5 kts
11° C
11
74%
1015 hpa
1.4 m
8 s
1.2 m
236°
SW
20h
3 kts
max 4 kts
11° C
11
75%
1015 hpa
1.3 m
8 s
1.0 m
224°
SW
21h
2 kts
max 3 kts
11° C
11
77%
1015 hpa
1.3 m
8 s
0.7 m
212°
SSW
22h
1 kts
max 2 kts
11° C
11
78%
1015 hpa
1.3 m
8 s
0.5 m
183°
S
23h
1 kts
max 2 kts
11° C
11
78%
1015 hpa
1.2 m
8 s
0.3 m
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Additional information
General
This is the wind, wave and weather Superforecast for Alcatraz Island, San Francisco Bay in California, United States of America. Windfinder specializes in wind, waves, tides and weather reports & forecasts for wind related sports like kitesurfing, windsurfing, surfing, sailing or paragliding.
Superforecast
The Superforecast is based on the best high resolution weather prediction models. The Superforecast is available for Europe, North America, South Africa, Egypt and the Canary Islands. The horizontal resolution is 5 kilometers. The Superforecast is updated 4 times per day. Predictions are available in time steps of 1 hour for up to 3 days into the future. Forecast and Superforecast are based on different physical models and therefore may cause divergent predictions. Due to its higher horizontal resolution the Superforecast tends to be more accurate, especially for locations with a complex topography and local thermal effects. The arrows point in the direction in which the wind is blowing.Check the Superforecast for Alcatraz Island, San Francisco Bay when you search for the best travel destinations for your kiteboarding, windsurfing or sailing vacations in United States of America. Or use the Superforecast to find the wind speed today in Alcatraz Island, San Francisco Bay or to have a look at the wind direction tomorrow at Alcatraz Island, San Francisco Bay.
Severe Weather Warnings
When a severe weather warning or advisory is provided by the local meteorological institute, we display it as a banner above the wind forecast.The weather warning, for example a high wind warning, can help you prepare for dangerous weather conditions and avoid weather-related risks. The color scale indicates the intensity of the predicted weather event. For more details click or tap on the warning. General information about severe weather warnings can be found in our help section.
Please be aware that severe weather may occur without a prior severe weather warning being reported.
Units
We use knots and degrees Celsius as our default units. These units are often used by sailors, kiters, surfers, windsurfers and paragliders. Use website settings to switch between units and 7 different languages at any time. For converting between wind speed units such as knots, km/h (kilometers per hour), m/s (meters per second), and mph (miles per hour) use our wind speed calculator.