Waimanu Bay surfForecast / HAW – Big Island / USA

information circle16 Day Weather and Surf, issued 7 pm Thursday 30 Apr 2026 HST
Forecast update in hr  min  s Forecast update imminent
Waimanu Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Waimanu Bay sea temperature is
25.4° C
(Which is slightly warmer than usual)

Best Forecast Surf Conditions for Waimanu Bay this week:

The most powerful waves expected at Waimanu Bay in the next 16 days are 1.9m 8s and forecast to arrive on Friday (May 01) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8AM (Fri 1st May)6ft (1.9m) 8s

Table - best surf conditions forecast for Waimanu Bay over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 2mm), mostly falling on Fri night. Warm (max 25°C on Sun morning, min 22°C on Thu night). Mainly fresh winds.

Days 5-7 Weather Summary

Mostly dry. Warm (max 25°C on Mon morning, min 23°C on Sun night). Wind will be generally light.

Friday
1
Saturday
2
Sunday
3
Monday
4
Tuesday
5
Wednesday
6
Thu
7
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
0
0
0
0
0
0
2
0
0
0
0
0
0
0
0
1
0
0
1
0
0
Swell
Height Map
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
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<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)
1.5
ENE
7
1.9
ENE
8
1.8
ENE
8
1.7
ENE
8
1.7
ENE
8
1.8
ENE
8
1
NW
14
1.5
ENE
8
1.5
ENE
8
1.5
ENE
8
1.5
ENE
8
1.3
ENE
7
1.3
E
8
1.4
E
8
1.4
E
8
1.1
E
8
1
E
8
0.9
E
8
0.8
E
8
1.1
E
8
1.2
E
8
Wave Graph
Metric surfscale
Energy kJ
231
400
383
364
339
387
357
259
253
253
240
172
196
247
252
161
129
102
88
169
190
Wind (km/h)
25
E
30
ENE
25
E
20
E
20
E
20
E
15
E
25
ENE
20
E
20
E
20
E
20
E
15
E
15
ENE
15
E
10
ESE
10
ENE
15
ENE
15
E
15
ENE
15
E
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
High Tide
2:04AM0.57m
3:21PM0.92m
2:31AM0.53m
3:54PM0.93m
2:57AM0.50m
4:28PM0.91m
3:23AM0.47m
5:06PM0.88m
3:47AM0.45m
5:47PM0.85m
4:12AM0.43m
6:34PM0.81m
4:45AM0.40m
7:26PM0.79m
Low Tide
9:15PM0.32m
8:12AM0.08m
9:56PM0.33m
8:37AM0.08m
10:37PM0.34m
9:04AM0.08m
11:20PM0.35m
9:32AM0.09m
00:08AM0.37m
10:01AM0.12m
1:09AM0.39m
10:33AM0.15m
2:31AM0.39m
11:09AM0.20m
part cloud
part cloud
part cloud
rain showers
clear
clear
rain showers
clear
clear
clear
clear
clear
part cloud
part cloud
clear
part cloud
clear
part cloud
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:52
5:52
5:52
5:50
5:50
5:50
5:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:45
6:45
6:46
6:46
6:46
6:47
6:47
1
1
Temp °C
23
24
24
23
24
24
23
25
25
24
25
25
24
25
25
24
25
24
23
25
25
21
21
22
21
23
24
23
25
25
24
25
25
24
26
26
25
26
25
23
25
26
Swell 1
Height (m)
Direction
Period (s)
0.8
NNW
13
0.8
NNW
13
0.8
NNW
12
0.7
NNW
11
0.7
NW
16
0.9
NNW
15
0.9
NW
14
0.7
NW
13
0.6
NW
12
0.5
NW
12
0.5
NW
11
0.5
ESE
9
0.6
NW
13
0.6
NW
12
0.7
NW
12
1.1
E
8
0.6
NNW
11
0.6
NNW
11
0.6
NNW
10
0.6
NNW
10
0.5
NNW
10
Energy kJ
219
209
164
115
251
387
264
172
118
69
58
42
101
114
140
161
78
75
67
68
55
Swell 2
Height (m)
Direction
Period (s)
0.4
NE
10
0.2
NNW
20
0.6
NW
19
0.7
NNW
12
1
NW
14
0.9
ESE
8
0.8
NW
12
0.8
NW
12
0.6
NW
11
0.4
NW
11
0.1
N
8
0.1
NE
10
0.1
NE
9
0.6
NW
11
0.2
ENE
8
0.3
NE
8
0.4
NE
8
0.5
NW
17
0.5
NW
16
Energy kJ
23
40
287
127
357
125
175
169
96
41
1
4
3
97
7
11
24
147
127
Swell 3
Height (m)
Direction
Period (s)
0.4
NE
9
0.9
NW
13
0.1
N
9
0.3
NW
13
0.1
NE
10
0.1
N
8
0.2
ENE
9
0.3
NE
8
0.1
NW
20
0.3
NW
18
0.3
N
6
0.3
N
6
Energy kJ
23
245
2
28
4
1
8
11
15
52
7
7
Wind waves
Height (m)
Direction
Period (s)
1.5
ENE
7
1.9
ENE
8
1.8
ENE
8
1.7
ENE
8
1.7
ENE
8
1.8
ENE
8
1.6
ENE
8
1.5
ENE
8
1.5
ENE
8
1.5
ENE
8
1.5
ENE
8
1.3
ENE
7
1.3
E
8
1.4
E
8
1.4
E
8
1
E
8
0.9
E
8
0.8
E
8
1.1
E
8
1.2
E
8
Energy kJ
231
400
383
364
339
378
295
259
253
253
240
172
196
247
252
129
102
88
169
190
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
2
2
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
Distance (km)
69
101
58
69
77
24
66
58
77
58
77
68
74
74
98
74
97
98
70
74
74
Best forecast wave conditions in Big Island
Rating
(10 max)
1
1
2
2
1
2
1
1
2
1
1
2
2
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
3
3
3
3
3
3
2
2
1
3
2
3
2
2
2
2
2
1
2
3
2
Header Global
Rating
(10 max)
7
5
9
5
4
4
5
4
4
5
5
5
5
4
5
5
5
6
9
8
6
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Waimanu Bay Surf forecast

The above surf forecast table for Waimanu Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Waimanu Bay can be found by selecting the local surf guide option on the grey menu. Our Waimanu Bay surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Waimanu Bay) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Waimanu Bay may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Waimanu Bay is 74 km (46 miles) from Hilo. If you plan a vacation in Big Island, look for hotels and other accommodation in Hilo. Hilo has rooms for a wide range of budgets as well as car hire and transport links.

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