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 06:13 AM and sunset is at 04:50 PM.

Days 1–3 Weather Summary

Heavy rain (total 68mm), heaviest during Mon morning. Warm air temperatures (max 25°C on Sun afternoon, min 22°C on Sun night). Winds increasing (light winds from the NNE on Mon afternoon, near gales from the ENE by Tue night).

Days 4–6 Weather Summary

Moderate rain (total 14mm), heaviest on Thu night. Warm air temperatures (max 25°C on Thu night, min 22°C on Fri night). Winds decreasing (strong winds from the E on Wed morning, light winds from the S by Thu night).

Days 7–9 Weather Summary

Light rain (total 7mm), mostly falling on Sun afternoon. Warm (max 21°C on Sat morning, min 19°C on Sun morning). Winds decreasing (strong winds from the NE on Sat morning, light winds from the NE by Mon night).

Days 10–12 Weather Summary

Heavy rain (total 20mm), heaviest during Wed night. Warm (max 25°C on Wed afternoon, min 18°C on Thu night). Winds increasing (light winds from the NE on Tue morning, strong winds from the SSW by Wed night).

Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
1
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
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
5:05AM0.73m
3:06PM0.83m
6:00AM0.79m
3:53PM0.84m
Low Tide
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
9:50PM0.17m
9:37AM0.59m
10:38PM0.09m
10:46AM0.61m
11:21PM0.02m
Wave
height (m) 
direction
period (s) 
2.5
E
9
2.5
E
9
2.5
E
10
2.5
E
10
2.3
E
10
2.2
E
10
2.1
E
10
2.5
ENE
9
4
NE
10
3
NE
10
3
ENE
9
3
ENE
9
2.5
E
9
2.5
E
9
2.4
E
9
2.3
ESE
9
2.2
E
9
2.5
NE
8
3
N
8
3
NNW
10
2.4
NNW
9
2.1
NNW
9
2
N
9
1.9
N
9
1.8
NE
12
1.8
NE
12
1.8
NE
11
1.6
NE
11
1.7
NE
12
1.8
NE
12
1.7
NE
13
2
NE
13
2.5
S
7
3
WSW
7
3
WNW
8
3
NW
9
cloud
cloud
heavy rain
heavy rain
light rain
thunderstorm
cloud
thunderstorm
mod rain
light rain
rain showers
clear
rain showers
thunderstorm
thunderstorm
thunderstorm
cloud
rain showers
part cloud
cloud
light rain
light rain
light rain
part cloud
clear
part cloud
part cloud
part cloud
clear
part cloud
part cloud
cloud
thunderstorm
cloud
cloud
part cloud
cloudy
cloudy
heavy rain
heavy rain
light rain
risk tstorm
cloudy
risk tstorm
mod rain
light rain
rain shwrs
clear
rain shwrs
risk tstorm
risk tstorm
risk tstorm
cloudy
rain shwrs
some clouds
cloudy
light rain
light rain
light rain
some clouds
clear
some clouds
some clouds
some clouds
clear
some clouds
some clouds
cloudy
risk tstorm
cloudy
cloudy
some clouds
 km/h
40
ESE
40
SE
40
SE
25
WNW
15
NNE
20
ENE
35
ENE
45
ENE
50
ENE
40
E
40
E
35
E
35
E
30
ESE
30
SE
25
NW
35
N
35
NNE
40
NE
35
NE
25
NE
30
NNE
35
NNE
30
NE
25
NE
20
ENE
15
ESE
15
NE
25
N
25
ENE
30
ESE
40
SSE
50
SSW
40
NW
40
NW
35
NNW
 mm 
17
42
1
1
1
6
1
2
2
1
5
2
1
2
2
3
20
max°C
24
25
25
23
24
24
24
24
23
23
24
24
24
24
25
24
24
23
21
21
21
20
19
21
20
21
21
22
22
22
23
25
25
22
21
20
Moonrise
7:11
7:58
8:40
9:18
9:52
10:25
10:57
11:30
12:06
12:46
1:33
2:28
Moonset
5:42
6:39
7:37
8:34
9:31
10:27
11:24
12:24
1:27
2:34
3:45
Sunrise
6:13
6:13
6:15
6:15
6:16
6:16
6:16
6:16
6:18
6:18
6:18
6:18
Sunset
4:50
4:50
4:51
4:51
4:52
4:52
4:52
4:53
4:53
4:54
4:55
4:55
Today's sea temperature in Nisi (Io Sima) is
26.0° C
(Statistics for 21 Dec 1981-2005 – mean: 24.6 max: 26.3 min: 23.5°C)
Issued (local time): 2 am Sunday 21 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest