Mahai'ula Bay surfForecast / HAW – Big Island / USA

information circle48hr Weather and Surf, issued 7 am Saturday 25 Apr 2026 HST
Forecast update in hr  min  s Forecast update imminent
Mahai'ula Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Mahai'ula Bay sea temperature is
25.9° C
(Which is 1.2°C warmer than normal for this time of year)

How big are the waves at Mahai'ula Bay today?

The current surf forecast for Mahai'ula Bay at 1PM is: 0.6m 12s primary swell from a West-northwest direction (forecast issued at 07:00am April 25). An open ocean swell of 0.9m 8s is not directed at the surf break. The wind direction is predicted to be onshore.

Time (HST) & DateWave HeightWave Period
Morning (25 Apr)2ft (0.6m)12s
Afternoon (25 Apr)2ft (0.6m)11s
Evening (25 Apr)1.5ft (0.5m)11s

Table - waves today at Mahai'ula Bay. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 2mm), mostly falling on Sat night. Warm (max 26°C on Sun afternoon, min 23°C on Sat night). Wind will be generally light.

Saturday
25
Sunday
26
Monday
27
Tue
28
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
Rating
(10 max)
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
Wave
Height (m)
Direction
Period (s)
0.6
WNW
12
0.6
WNW
12
0.6
WNW
12
0.6
WNW
11
0.5
WNW
11
0.5
WNW
11
0.5
WNW
11
0.4
WNW
11
0.4
WNW
11
0.4
WNW
10
0.4
WNW
10
0.4
WNW
10
0.4
NW
12
0.4
NW
12
0.4
NW
12
0.4
NW
11
0.4
NW
11
0.4
NW
11
0.3
NW
11
0.3
NW
11
0.3
NW
11
0.5
SW
13
0.5
SW
13
0.5
SW
13
Wave Graph
Metric surfscale
Energy kJ
113
111
106
102
70
66
65
38
37
37
33
33
37
37
34
33
32
32
19
19
19
0
0
0
Wind (km/h)
5
NNE
5
NNW
10
WNW
5
W
10
SW
10
SSW
5
WSW
5
NW
10
N
5
NNE
5
WSW
10
SW
15
SSW
5
SW
5
W
10
NNW
5
N
0
NE
10
WSW
10
WSW
10
W
5
WNW
0
N
0
NE
glassy
glassy
on
cross-on
cross
cross
cross-on
cross-on
cross
cross
cross-on
cross-on
cross
cross-on
on
cross-on
cross
glassy
cross-on
cross-on
cross-on
on
glassy
glassy
High Tide
12:40PM0.42m
00:05AM0.64m
1:23PM0.52m
00:52AM0.61m
1:59PM0.61m
1:32AM0.57m
Low Tide
6:33AM0.13m
5:35PM0.26m
7:02AM0.11m
6:52PM0.25m
7:28AM0.09m
7:53PM0.23m
clear
clear
clear
clear
clear
part cloud
part cloud
rain showers
rain showers
part cloud
clear
clear
part cloud
clear
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:58
5:58
5:56
5:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:45
6:45
6:45
1
1
Temp °C
23
24
25
25
25
25
24
24
23
24
25
26
25
25
24
24
23
25
26
25
25
25
24
24
25
26
26
26
26
26
26
26
24
25
26
27
25
27
26
26
25
28
28
26
27
27
27
27
Swell 1
Height (m)
Direction
Period (s)
0.9
NNE
9
0.9
NNE
9
0.9
NNE
8
0.9
NNE
8
0.9
NNE
8
0.9
NNE
8
0.8
NNE
8
0.8
NNE
8
0.8
NNE
8
0.7
NNE
8
0.7
NNE
8
0.8
NNE
8
0.8
NNE
8
0.8
NNE
8
0.8
NNE
8
0.8
NNE
8
0.8
NNE
8
0.7
NNE
8
0.6
NNE
7
0.7
NNE
7
0.7
NNE
7
0.6
NNE
7
0.6
NNE
7
0.6
NNE
7
Energy kJ
111
108
113
105
103
100
80
71
73
56
56
69
74
72
74
74
66
50
37
47
44
31
32
31
Swell 2
Height (m)
Direction
Period (s)
0.6
WNW
12
0.6
WNW
12
0.6
WNW
12
0.6
WNW
11
0.5
WNW
11
0.5
SW
16
0.5
SW
15
0.6
SSW
15
0.6
SSW
15
0.6
SW
15
0.6
SW
14
0.6
SW
14
0.6
SW
14
0.6
SSW
14
0.5
SW
14
0.5
SW
14
0.5
SW
14
0.5
SW
13
0.5
SW
13
0.5
SW
13
0.5
SW
13
0.5
SW
13
0.5
SW
13
0.5
SW
13
Energy kJ
113
111
106
102
70
121
116
146
142
171
169
169
167
136
97
93
89
88
85
85
84
84
84
83
Swell 3
Height (m)
Direction
Period (s)
0.4
SSW
16
0.5
SW
16
0.5
SW
16
0.5
SW
16
0.5
SW
16
0.5
WNW
11
0.5
WNW
11
0.4
WNW
11
0.4
WNW
11
0.4
WNW
10
0.4
WNW
10
0.4
WNW
10
0.4
NW
12
0.4
NW
12
0.4
NW
12
0.4
NW
11
0.4
NW
11
0.4
NW
11
0.3
NW
11
0.3
NW
11
0.3
NW
11
0.3
NNE
9
0.2
NNE
9
0.2
NNE
8
Energy kJ
97
118
118
121
121
66
65
38
37
37
33
33
37
37
34
33
32
32
19
19
19
15
7
7
Wind waves
Height (m)
Direction
Period (s)
0.6
N
8
0.2
W
9
Energy kJ
42
6
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
0
0
34
34
18
4
18
19
19
19
34
34
34
24
100
19
19
1
100
103
100
100
1
1
Best forecast wave conditions in Big Island
Rating
(10 max)
2
2
2
1
2
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
2
3
2
1
2
2
2
3
2
2
3
3
3
2
2
2
2
2
1
1
1
1
2
2
Header Global
Rating
(10 max)
4
5
5
8
5
7
6
5
7
7
9
9
8
7
5
6
6
6
5
5
5
5
5
5
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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