Nisi (Io Sima) Sea Conditions and Tide Table

Nisi (Io Sima) 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 —.

Days 1–4 Weather Summary

Light rain (total 5mm), mostly falling on Thu night. Warm air temperatures (max 25°C on Sun afternoon, min 22°C on Thu night). Winds increasing (moderate winds from the NE on Thu night, strong winds from the E by Sat morning).

Days 5–7 Weather Summary

Heavy rain (total 62mm), heaviest during Mon afternoon. Warm air temperatures (max 25°C on Sun night, min 22°C on Mon morning). Winds increasing (moderate winds from the NW on Mon afternoon, near gales from the ENE by Tue afternoon).

Days 8–10 Weather Summary

Light rain (total 5mm), mostly falling on Thu morning. Warm (max 25°C on Wed night, min 22°C on Fri night). Winds increasing (light winds from the SSE on Thu afternoon, strong winds from the WNW by Sat afternoon).

Days 11–13 Weather Summary

Light rain (total 4mm), mostly falling on Sun night. Warm (max 22°C on Sat night, min 20°C on Sun night). Winds increasing (light winds from the NW on Sun night, near gales from the WNW by Mon night).

Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tue
30
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
PM
Wave Height Map
High Tide
7:03AM0.88m
5:12PM0.89m
7:43AM0.91m
5:51PM0.89m
8:21AM0.93m
6:31PM0.88m
8:58AM0.93m
7:12PM0.86m
9:34AM0.92m
7:56PM0.83m
10:11AM0.91m
8:44PM0.78m
10:47AM0.89m
9:39PM0.73m
11:24AM0.87m
10:48PM0.67m
12:04PM0.85m
00:17AM0.63m
12:45PM0.84m
2:06AM0.62m
1:30PM0.83m
3:49AM0.66m
2:18PM0.83m
Low Tide
11:49PM0.01m
12:06PM0.60m
00:27AM-0.03m
12:51PM0.60m
1:05AM-0.05m
1:33PM0.59m
1:42AM-0.04m
2:16PM0.58m
2:20AM-0.01m
3:01PM0.56m
2:58AM0.04m
3:48PM0.53m
3:37AM0.11m
4:41PM0.50m
4:18AM0.20m
5:41PM0.46m
5:03AM0.29m
6:47PM0.40m
7:54PM0.33m
6:58AM0.48m
8:56PM0.25m
8:17AM0.55m
Wave
height (m) 
direction
period (s) 
1.4
NE
17
1.5
NE
16
1.5
NE
15
1.9
NE
14
3
ENE
8
3.5
ENE
9
3
E
9
2.5
ENE
9
2.5
E
9
2.5
E
9
2.5
E
10
2.5
E
10
2.5
E
10
3.5
ENE
9
3.5
E
9
4.5
NE
10
3.5
NE
10
3.5
NE
10
3
ENE
10
3
E
10
2.5
E
10
2.1
ENE
10
1.9
ENE
9
1.8
ENE
11
2.3
N
9
2.4
NNE
11
2.5
NNE
11
3
NNW
8
3
NW
10
2.5
NNW
9
2.4
NNE
12
2.3
NE
12
2.4
NE
12
2.5
NE
12
3
NW
8
2.5
NE
11
light rain
part cloud
clear
rain showers
rain showers
light rain
part cloud
part cloud
cloud
mod rain
thunderstorm
heavy rain
cloud
thunderstorm
thunderstorm
thunderstorm
rain showers
clear
clear
thunderstorm
thunderstorm
thunderstorm
clear
part cloud
part cloud
cloud
part cloud
part cloud
cloud
part cloud
rain showers
part cloud
part cloud
part cloud
clear
cloud
light rain
some clouds
clear
rain shwrs
rain shwrs
light rain
some clouds
some clouds
cloudy
mod rain
risk tstorm
heavy rain
cloudy
risk tstorm
risk tstorm
risk tstorm
rain shwrs
clear
clear
risk tstorm
risk tstorm
risk tstorm
clear
some clouds
some clouds
cloudy
some clouds
some clouds
cloudy
some clouds
rain shwrs
some clouds
some clouds
some clouds
clear
cloudy
 km/h
25
NE
30
NE
30
ENE
35
E
50
E
50
E
40
E
40
ESE
40
ESE
40
SE
25
SSW
25
NW
45
N
55
ENE
50
ENE
50
ENE
45
E
35
E
30
ESE
30
ESE
15
SSE
10
SW
15
WNW
20
NW
25
NNW
30
WNW
40
WNW
45
WNW
30
NNW
25
NNW
20
NNW
25
WNW
30
W
40
W
45
NW
40
NW
 mm 
1
1
2
1
6
18
19
1
4
11
3
1
1
3
4
max°C
23
23
23
24
23
23
24
24
25
25
23
24
24
24
23
23
24
25
25
25
25
25
24
24
23
22
23
22
21
21
21
22
22
21
22
21
Moonrise
5:26
6:20
7:11
7:58
8:40
9:18
9:52
10:25
10:57
11:30
12:06
12:46
Moonset
3:55
4:47
5:42
6:39
7:37
8:34
9:31
10:27
11:24
12:24
1:27
Sunrise
6:13
6:13
6:13
6:13
6:15
6:15
6:16
6:16
6:16
6:16
6:18
6:18
Sunset
4:49
4:49
4:50
4:50
4:51
4:51
4:52
4:52
4:52
4:53
4:53
4:54
Today's sea temperature in Nisi (Io Sima) is
26.1° C
(Statistics for 18 Dec 1981-2005 – mean: 24.8 max: 26.3 min: 23.6°C)
Issued (local time): 8 pm Thursday 18 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest