San Juan Sea Conditions and Tide Table

San Juan 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 04:33 AM and sunset is at 09:51 PM.

Days 1–3 Weather Summary

Mostly dry. Low air temperatures (max 9°C on Sat night, min 4°C on Thu morning). Mainly near gales.

Days 4–6 Weather Summary

Light rain (total 8mm), mostly falling on Sun afternoon. Low air temperatures (max 9°C on Mon afternoon, min 5°C on Mon night). Winds increasing (light winds from the WSW on Mon night, near gales from the NNW by Tue night).

Days 7–9 Weather Summary

Moderate rain (total 13mm), heaviest on Thu night. Mild temperatures (max 7°C on Wed morning, min 3°C on Thu night). Winds increasing (light winds from the ENE on Thu night, near gales from the SW by Fri afternoon).

Days 10–12 Weather Summary

Light rain (total 7mm), mostly falling on Sun night. Mild temperatures (max 8°C on Mon afternoon, min 5°C on Sat night). Winds increasing (calm on Sat afternoon, near gales from the SW by Mon night).

Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
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
PM
night
Wave Height Map
High Tide
6:41PM2.20m
7:19PM2.22m
6:36AM2.43m
7:55PM2.23m
7:13AM2.47m
8:30PM2.23m
7:51AM2.49m
9:05PM2.23m
8:29AM2.48m
9:40PM2.23m
9:09AM2.44m
10:16PM2.25m
9:52AM2.37m
10:54PM2.27m
10:40AM2.28m
11:36PM2.30m
11:36AM2.18m
00:21AM2.33m
12:42PM2.09m
1:12AM2.36m
1:57PM2.05m
2:08AM2.40m
Low Tide
12:05PM0.59m
00:11AM1.26m
12:44PM0.51m
00:47AM1.24m
1:22PM0.47m
1:22AM1.22m
1:59PM0.45m
1:58AM1.19m
2:36PM0.46m
2:34AM1.16m
3:12PM0.50m
3:14AM1.14m
3:48PM0.55m
3:57AM1.12m
4:26PM0.63m
4:46AM1.09m
5:07PM0.72m
5:40AM1.05m
5:52PM0.83m
6:42AM0.98m
6:45PM0.95m
7:48AM0.87m
7:45PM1.06m
Wave
height (m) 
direction
period (s) 
2
SSW
7
1.8
SSW
7
1.2
S
6
0.9
SSE
6
1.4
NW
5
1.4
NW
6
1
NW
6
0.9
NW
6
1.6
NW
7
1.8
NNW
8
1.2
NNW
8
1.3
NW
8
1.8
NW
7
1.6
NNW
7
1.4
NNW
8
1.4
WNW
8
1.4
WNW
8
2.5
NW
8
1.5
NNW
8
2.1
WNW
8
1.8
WSW
8
1.6
WSW
8
1.6
W
8
1.5
W
9
1.2
WNW
8
1.8
SW
6
2.5
SSW
8
1.4
SSW
8
1.1
S
7
1.2
SE
8
1.2
SE
9
1.1
SE
9
1.2
ESE
9
1.3
ESE
9
1.2
ESE
9
1.9
SW
6
part cloud
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
cloud
cloud
light rain
rain showers
light rain
part cloud
light rain
rain showers
part cloud
part cloud
rain showers
cloud
part cloud
part cloud
light rain
mod rain
light rain
clear
clear
cloud
cloud
cloud
clear
part cloud
light rain
light rain
light rain
light rain
some clouds
some clouds
some clouds
cloudy
some clouds
some clouds
some clouds
some clouds
cloudy
cloudy
light rain
rain shwrs
light rain
some clouds
light rain
rain shwrs
some clouds
some clouds
rain shwrs
cloudy
some clouds
some clouds
light rain
mod rain
light rain
clear
clear
cloudy
cloudy
cloudy
clear
some clouds
light rain
light rain
light rain
light rain
 km/h
50
SW
45
SW
25
SW
30
NNW
50
NW
35
NNW
30
WNW
20
SSE
45
NW
40
WNW
20
WSW
20
N
40
NNW
40
NW
10
WSW
15
W
20
NW
60
NNW
35
WNW
50
WSW
45
WSW
40
WNW
35
SW
5
ENE
35
WSW
55
SW
55
SW
20
WSW
20
NW
20
S
25
S
15
SSW
10
W
20
NW
10
W
55
SW
 mm 
2
1
1
3
1
1
2
8
2
1
2
2
2
max°C
5
5
6
6
7
8
8
7
9
7
7
8
8
9
6
7
8
8
7
6
6
6
7
7
4
5
6
6
6
6
5
6
7
7
8
8
Moonrise
2:45
3:18
4:08
5:13
6:30
7:53
9:16
10:39
12:01
1:26
2:54
4:27
Moonset
9:30
10:28
11:11
11:40
11:59
12:12
12:22
12:30
12:37
12:45
12:54
Sunrise
4:33
4:33
4:33
4:33
4:33
4:33
4:35
4:35
4:35
4:37
4:37
4:39
Sunset
9:51
9:51
9:52
9:52
9:52
9:52
9:53
9:53
9:53
9:53
9:53
9:53
Today's sea temperature in San Juan is
7.8° C
(Statistics for 18 Dec 1981-2005 – mean: 6.9 max: 8.3 min: 6.0°C)
Issued (local time): 8 am Thursday 18 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest