Waimanu Bay surfForecast / HAW – Big Island / USA

information circle16 Day Weather and Surf, issued 1 pm Tuesday 28 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
25.5° 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 2.1m 8s and forecast to arrive on Saturday (May 02) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Sat 2nd May)7ft (2.1m) 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

Some drizzle, heaviest during Thu morning. Warm (max 24°C on Tue afternoon, min 22°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Sat afternoon. Warm (max 25°C on Fri afternoon, min 22°C on Fri night). Wind will be generally light.

Tue
28
Wednesday
29
Thursday
30
Friday
1
Saturday
2
Sunday
3
Monday
4
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
0
0
0
0
0
0
1
0
0
1
0
1
1
0
0
1
0
1
1
1
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>
Wave
Height (m)
Direction
Period (s)
1.6
ENE
7
1.1
E
7
1.2
ENE
7
0.6
NNW
14
0.7
NW
13
1.5
ENE
7
1.4
ENE
7
1.6
ENE
8
1.7
ENE
8
1.8
ENE
8
2.1
ENE
8
2
ENE
8
1.1
NW
15
0.9
NW
14
1.4
ENE
8
1.2
ENE
8
1
ENE
8
1.1
ENE
8
1
ENE
8
0.7
NW
11
0.9
NW
12
Wave Graph
Metric surfscale
Energy kJ
252
127
128
136
178
218
197
310
336
402
547
498
509
264
243
183
125
138
110
133
199
Wind (km/h)
20
E
20
E
20
ENE
25
ENE
20
E
25
ENE
25
E
25
E
25
ENE
25
ENE
20
E
20
E
15
E
15
E
15
E
15
E
15
ESE
15
ENE
15
E
10
ESE
10
E
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross
cross
cross
High Tide
1:08AM0.65m
2:19PM0.85m
1:37AM0.61m
2:50PM0.89m
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
Low Tide
7:45PM0.33m
7:26AM0.12m
8:32PM0.33m
7:48AM0.09m
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
clear
clear
clear
clear
clear
rain showers
clear
clear
clear
clear
part cloud
clear
rain showers
clear
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:52
5:52
5:52
5:52
5:50
5:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:45
6:45
6:45
6:45
6:46
6:46
6:46
1
2
Temp °C
24
23
24
24
23
24
24
23
24
25
23
25
24
23
25
25
24
25
25
24
26
24
23
23
23
22
22
22
21
22
23
22
25
24
23
26
26
25
26
26
25
28
Swell 1
Height (m)
Direction
Period (s)
0.4
NW
10
0.7
NE
7
0.5
NW
14
0.6
NNW
14
0.6
NNW
13
0.7
NNW
12
0.7
NW
12
0.8
NNW
13
0.9
NNW
13
0.8
NNW
12
0.7
NNW
11
0.7
NW
15
0.9
NNW
15
1.1
NE
8
0.7
NW
14
0.7
NW
13
1
ENE
8
0.6
NW
11
0.5
NW
11
0.7
NW
11
0.9
NW
12
Energy kJ
27
49
96
136
116
131
147
219
257
184
115
242
393
145
189
167
125
77
59
133
199
Swell 2
Height (m)
Direction
Period (s)
0.2
NNW
15
0.4
NW
13
0.4
NE
10
0.4
NE
10
0.5
NE
9
0.4
NE
9
0.4
NE
10
0.9
NNW
13
0.1
NW
20
0.5
NW
19
0.7
NNW
12
1.1
NW
15
0.9
NW
14
0.3
ESE
10
0.5
ESE
10
0.6
NW
12
0.4
ESE
9
0.4
ESE
9
0.8
ENE
7
0.7
ENE
7
Energy kJ
21
46
24
23
36
19
26
265
15
177
127
509
264
20
54
116
32
32
62
55
Swell 3
Height (m)
Direction
Period (s)
0.4
NW
10
0.2
NNW
9
0.4
NE
9
0.7
NW
13
0.2
NNE
11
0.2
NNE
8
0.9
ESE
8
0.4
NW
20
0.9
ESE
8
0.8
ESE
10
0.8
ESE
10
0.5
ESE
9
0.2
NNW
14
0.4
NW
13
0.4
ESE
8
0.6
N
12
Energy kJ
24
8
23
178
11
7
102
97
112
111
117
45
18
46
28
103
Wind waves
Height (m)
Direction
Period (s)
1.6
ENE
7
1.1
E
7
1.2
ENE
7
1.2
ENE
7
1.1
ENE
7
1.5
ENE
7
1.4
ENE
7
1.6
ENE
8
1.7
ENE
8
1.8
ENE
8
2.1
ENE
8
2
ENE
8
1.8
ENE
8
1.4
ENE
8
1.2
ENE
8
1.1
ENE
8
1
ENE
8
0.4
E
3
Energy kJ
252
127
128
128
121
218
197
310
336
402
547
498
394
243
183
138
110
3
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
2
1
1
2
1
1
3
1
2
2
2
2
1
1
1
1
Distance (km)
77
58
107
58
69
77
58
58
77
72
69
77
24
68
77
77
66
74
77
29
29
Best forecast wave conditions in Big Island
Rating
(10 max)
1
1
1
1
2
1
2
2
1
2
3
1
2
2
2
2
2
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
1
2
2
1
3
2
2
3
2
3
4
3
3
2
3
2
3
3
3
3
3
Header Global
Rating
(10 max)
8
6
8
6
5
6
7
4
5
5
4
4
4
4
4
7
5
4
5
4
5
  • 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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