Daily Superforecast
asLast update: 08:38 local time
Wednesday, Sep 17
Wind
Weather
125°
SE
00h
14 kts
max 31 kts
18° C
18
49%
906 hpa
127°
SE
01h
14 kts
max 28 kts
18° C
18
50%
906 hpa
124°
SE
02h
11 kts
max 22 kts
18° C
18
50%
906 hpa
121°
ESE
03h
9 kts
max 17 kts
18° C
18
49%
906 hpa
119°
ESE
04h
6 kts
max 10 kts
18° C
18
46%
905 hpa
103°
ESE
05h
3 kts
max 3 kts
16° C
16
50%
906 hpa
90°
E
06h
3 kts
max 4 kts
16° C
16
50%
906 hpa
74°
ENE
07h
1 kts
max 2 kts
15° C
15
49%
906 hpa
341°
NNW
08h
1 kts
max 3 kts
15° C
15
54%
907 hpa
322°
NW
09h
3 kts
max 4 kts
16° C
16
59%
907 hpa
309°
NW
10h
4 kts
max 4 kts
16° C
16
62%
908 hpa
312°
NW
11h
5 kts
max 5 kts
17° C
17
64%
908 hpa
321°
NW
12h
5 kts
max 5 kts
17° C
17
69%
908 hpa
319°
NW
13h
6 kts
max 6 kts
17° C
17
72%
908 hpa
319°
NW
14h
6 kts
max 6 kts
18° C
18
72%
908 hpa
328°
NNW
15h
7 kts
max 8 kts
17° C
17
69%
909 hpa
338°
NNW
16h
8 kts
max 8 kts
17° C
17
63%
908 hpa
342°
NNW
17h
8 kts
max 9 kts
16° C
16
66%
908 hpa
340°
NNW
18h
8 kts
max 11 kts
15° C
15
73%
908 hpa
342°
NNW
19h
6 kts
max 9 kts
13° C
13
80%
908 hpa
343°
NNW
20h
4 kts
max 7 kts
12° C
12
84%
908 hpa
326°
NW
21h
3 kts
max 5 kts
11° C
11
87%
908 hpa
327°
NNW
22h
2 kts
max 3 kts
10° C
10
90%
909 hpa
329°
NNW
23h
1 kts
max 1 kts
10° C
10
90%
908 hpa
Thursday, Sep 18
Wind
Weather
327°
NNW
00h
2 kts
max 2 kts
9° C
9
92%
908 hpa
314°
NW
01h
2 kts
max 3 kts
9° C
9
95%
908 hpa
321°
NW
02h
1 kts
max 1 kts
9° C
9
98%
907 hpa
338°
NNW
03h
1 kts
max 1 kts
9° C
9
98%
907 hpa
350°
N
04h
0 kts
max 0 kts
8° C
8
98%
907 hpa
20°
NNE
05h
1 kts
max 1 kts
0.05 mm
8° C
8
98%
907 hpa
351°
N
06h
2 kts
max 2 kts
8° C
8
98%
907 hpa
32°
NNE
07h
1 kts
max 2 kts
8° C
8
97%
907 hpa
356°
N
08h
1 kts
max 2 kts
8° C
8
96%
907 hpa
311°
NW
09h
3 kts
max 3 kts
8° C
8
95%
907 hpa
309°
NW
10h
3 kts
max 4 kts
8° C
8
97%
907 hpa
300°
WNW
11h
3 kts
max 3 kts
9° C
9
96%
907 hpa
285°
WNW
12h
2 kts
max 2 kts
10° C
10
88%
907 hpa
283°
WNW
13h
2 kts
max 2 kts
11° C
11
85%
906 hpa
296°
WNW
14h
3 kts
max 3 kts
12° C
12
79%
906 hpa
306°
NW
15h
4 kts
max 4 kts
13° C
13
76%
906 hpa
314°
NW
16h
4 kts
max 5 kts
13° C
13
76%
905 hpa
312°
NW
17h
4 kts
max 4 kts
12° C
12
78%
905 hpa
291°
WNW
18h
2 kts
max 2 kts
11° C
11
83%
905 hpa
263°
W
19h
1 kts
max 1 kts
10° C
10
89%
905 hpa
133°
SE
20h
0 kts
max 1 kts
10° C
10
91%
905 hpa
47°
NE
21h
0 kts
max 1 kts
9° C
9
91%
905 hpa
107°
ESE
22h
1 kts
max 1 kts
9° C
9
92%
905 hpa
110°
ESE
23h
1 kts
max 1 kts
9° C
9
93%
905 hpa
Friday, Sep 19
Wind
Weather
69°
ENE
00h
1 kts
max 1 kts
8° C
8
93%
905 hpa
72°
ENE
01h
1 kts
max 1 kts
8° C
8
92%
904 hpa
89°
E
02h
1 kts
max 2 kts
8° C
8
89%
904 hpa
95°
E
03h
2 kts
max 2 kts
8° C
8
87%
904 hpa
85°
E
04h
1 kts
max 3 kts
7° C
7
86%
904 hpa
99°
E
05h
2 kts
max 3 kts
7° C
7
82%
904 hpa
101°
E
06h
1 kts
max 3 kts
7° C
7
80%
904 hpa
131°
SE
07h
2 kts
max 3 kts
7° C
7
76%
904 hpa
131°
SE
08h
1 kts
max 2 kts
8° C
8
73%
903 hpa
276°
W
09h
1 kts
max 1 kts
10° C
10
73%
903 hpa
298°
WNW
10h
2 kts
max 2 kts
11° C
11
73%
904 hpa
291°
WNW
11h
3 kts
max 3 kts
12° C
12
73%
904 hpa
304°
NW
12h
4 kts
max 4 kts
14° C
14
72%
903 hpa
294°
WNW
13h
4 kts
max 4 kts
15° C
15
70%
903 hpa
303°
WNW
14h
4 kts
max 4 kts
16° C
16
67%
903 hpa
307°
NW
15h
4 kts
max 4 kts
16° C
16
66%
903 hpa
310°
NW
16h
4 kts
max 4 kts
16° C
16
66%
902 hpa
317°
NW
17h
4 kts
max 4 kts
16° C
16
69%
902 hpa
318°
NW
18h
4 kts
max 4 kts
15° C
15
68%
890 hpa
319°
NW
19h
3 kts
max 3 kts
14° C
14
72%
890 hpa
320°
NW
20h
1 kts
max 2 kts
13° C
13
76%
890 hpa
327°
NNW
21h
2 kts
max 2 kts
12° C
12
78%
890 hpa
127°
SE
22h
2 kts
max 2 kts
12° C
12
80%
890 hpa
133°
SE
23h
2 kts
max 3 kts
12° C
12
82%
890 hpa
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Additional information
General
This is the wind, wave and weather Superforecast for Mt. Si in Washington, 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 Mt. Si 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 Mt. Si or to have a look at the wind direction tomorrow at Mt. Si.
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.