Waimanu Bay Surf Break

Lat Long: 20.15° N 155.64° W

Waimanu Bay Surf Forecast and Surf Report

Issued: 7 am 23 Aug 2026 (local time)

Forecast update in  hr  min

Today's Waimanu Bay sea temperature is
27.4°C
0.8° 

Waimanu Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Waimanu Bay surf forecast from 23 Aug 2026:

  • Most powerful swell: Sunday 23 Aug, 2PM (local time) - 6ft (1.9m), 9s period, E swell with 562 kJ wave energy.

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 9s and forecast to arrive on Sunday (Aug 23) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 9s period and expected on Sunday (Aug 23) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2PM (Sun 23rd Aug)6ft (1.9m) 9s

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


Short Range Forecast

Light rain (total 5mm), mostly falling on Sun morning. Warm (max 28°C on Mon morning, min 24°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Thu night. Warm (max 27°C on Wed afternoon, min 24°C on Wed night). Wind will be generally light.

Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
E
9
1.8
E
9
2
E
8
1.9
E
8
1.8
E
8
1.6
E
8
1.7
E
8
1.6
ENE
8
1.4
ENE
7
1.5
ENE
7
1.4
ENE
7
1.3
ENE
7
1.2
ENE
7
1.3
E
7
1.4
ENE
7
1.1
E
7
1.3
ENE
7
1.4
ENE
7
1.4
ENE
7
0.8
E
14
0.8
E
13
Wave Graph
Metric surfscale
Energy kJ
516
509
515
464
407
334
374
273
199
210
188
191
156
166
173
120
145
176
181
236
222
Wind (km/h)
25
E
25
E
25
E
25
E
25
E
20
E
25
E
25
ENE
20
E
20
ENE
20
E
20
E
20
E
20
ENE
20
E
20
ENE
20
ENE
20
E
25
ENE
20
ENE
15
E
Wind State
cross
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-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
1:09PM0.83m
00:13AM0.45m
1:38PM0.87m
00:55AM0.50m
2:04PM0.90m
1:32AM0.55m
2:29PM0.91m
2:09AM0.60m
2:54PM0.90m
2:47AM0.64m
3:17PM0.87m
3:26AM0.69m
3:41PM0.83m
4:07AM0.72m
Low Tide
8:07PM0.35m
6:14AM0.13m
8:22PM0.32m
6:54AM0.10m
8:39PM0.29m
7:30AM0.09m
8:58PM0.26m
8:05AM0.10m
9:18PM0.23m
8:41AM0.13m
9:39PM0.20m
9:19AM0.17m
10:02PM0.17m
light rain
rain showers
clear
clear
thunderstorm
thunderstorm
part cloud
clear
part cloud
clear
clear
clear
clear
clear
rain showers
clear
clear
rain showers
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:03
6:03
6:05
6:05
6:05
6:05
6:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:44
6:43
6:43
6:42
6:40
6:39
 mm
1
1
2
1
1
2
Temp °C
26
27
26
28
27
26
27
27
25
26
27
25
26
27
25
27
27
25
26
26
25
Feels °C
26
27
26
29
28
27
27
27
25
26
27
25
25
28
25
26
28
25
25
26
25
  • 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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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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