Half Moon Bay Sea Conditions and Tide Table

Half Moon Bay Sea Conditions table showing wave height, swell direction and period.

High and low tide times are also provided on the table along with the moon phase and forecast weather. Sunrise today is at — and sunset is at 04:55 PM.

Days 1–4 Weather Summary

Heavy rain (total 36mm), heaviest during Wed night. Cool air temperatures (max 17°C on Tue night, min 11°C on Thu afternoon). Mainly gales.

Days 5–7 Weather Summary

Moderate rain (total 11mm), heaviest on Fri night. Cool air temperatures (max 13°C on Sat afternoon, min 8°C on Sun night). Mainly strong winds.

Days 8–10 Weather Summary

Mostly dry. Very mild (max 17°C on Wed morning, min 9°C on Mon night). Wind will be generally light.

Days 11–13 Weather Summary

Mostly dry. Very mild (max 16°C on Thu afternoon, min 14°C on Thu night). Wind will be generally light.

Tue
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
1
Friday
2
Saturday
3
Sun
4
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
Wave Height Map
High Tide
2:06AM1.37m
12:24PM1.54m
2:42AM1.43m
1:18PM1.41m
3:18AM1.50m
2:24PM1.26m
3:54AM1.59m
3:48PM1.12m
4:34AM1.69m
5:27PM1.06m
5:16AM1.80m
7:03PM1.09m
8:20PM1.19m
9:24PM1.30m
7:40AM2.05m
10:16PM1.39m
8:32AM2.09m
11:03PM1.45m
9:24AM2.09m
11:46PM1.50m
10:15AM2.03m
Low Tide
6:50PM-0.14m
6:58AM1.01m
7:30PM-0.06m
8:01AM0.93m
8:11PM0.06m
9:12AM0.80m
8:56PM0.22m
10:24AM0.61m
9:46PM0.40m
11:30AM0.37m
10:40PM0.58m
12:30PM0.12m
11:39PM0.74m
1:25PM-0.12m
00:40AM0.86m
2:17PM-0.32m
1:40AM0.93m
3:07PM-0.45m
2:38AM0.94m
3:55PM-0.52m
3:33AM0.92m
4:42PM-0.52m
4:28AM0.88m
Wave
height (m) 
direction
period (s) 
2.1
S
6
4
S
9
2.5
SSW
10
2.3
SW
10
3.5
SSW
9
3
SSW
10
3.5
SW
10
4
WSW
12
4.5
WSW
12
4.5
W
14
4
W
12
2.3
W
10
1.8
WNW
10
1.2
WNW
9
0.9
WNW
9
0.8
WNW
8
0.7
NW
8
0.6
NW
8
0.6
NW
8
0.6
W
13
0.6
W
11
0.7
W
14
0.7
W
13
0.7
W
12
0.8
W
12
0.9
W
11
0.9
W
14
1
W
13
1
W
12
1
W
12
1
W
11
1
W
10
1.2
W
10
1.2
W
10
1.2
W
10
1.2
W
10
cloud
mod rain
cloud
light rain
rain showers
light rain
light rain
rain showers
thunderstorm
rain showers
rain showers
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
cloud
cloudy
mod rain
cloudy
light rain
rain shwrs
light rain
light rain
rain shwrs
risk tstorm
rain shwrs
rain shwrs
some clouds
clear
clear
clear
clear
clear
clear
clear
clear
clear
some clouds
some clouds
some clouds
some clouds
cloudy
some clouds
cloudy
some clouds
some clouds
some clouds
some clouds
some clouds
cloudy
some clouds
cloudy
 km/h
40
SSE
60
SSE
15
S
20
SE
60
SSE
40
SSW
55
SSE
40
SSW
45
S
35
SSW
40
SSW
15
NE
20
NE
10
NE
10
NE
15
NNE
15
ENE
15
NE
15
NE
20
ENE
20
NE
20
NE
10
ENE
15
NE
15
NE
10
ENE
5
E
5
S
10
SE
15
SSE
15
SSE
10
SE
10
SSW
10
S
10
S
10
S
 mm 
6
3
9
3
5
8
2
4
7
max°C
16
17
14
15
15
13
14
12
13
12
12
12
13
11
13
13
10
12
13
11
13
14
14
17
17
17
16
16
15
15
15
14
15
16
15
15
Moonrise
10:37
11:02
11:26
11:51
12:17
12:47
1:24
2:10
3:08
4:16
5:31
Moonset
8:32
9:36
10:40
11:46
12:53
2:04
3:19
4:36
5:52
7:02
8:00
8:46
Sunrise
7:22
7:22
7:22
7:22
7:22
7:22
7:24
7:24
7:24
7:24
7:24
7:24
Sunset
4:55
4:57
4:57
4:58
4:58
4:59
5:00
5:00
5:00
5:01
5:02
5:04
Today's sea temperature in Half Moon Bay is
13.3° C
(Statistics for 23 Dec 1981-2005 – mean: 12.4 max: 14.8 min: 10.8°C)
Issued (local time): 3 pm Tuesday 23 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest