Waimanu Bay Surf Forecast

/ HAW – Big Island (60 breaks) / Hawaii (267 breaks) /

USA (1297 breaks) / Lat Long: (20.15° N 155.64° W)

Surf Forecasts:

Waimanu Bay surfForecast / HAW – Big Island / USA

12 Day Weather and Surf, issued 1 am Saturday 25 Oct 2025 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 26.7° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Waimanu Bay this week:

The most powerful waves expected at Waimanu Bay in the next 12 days are 1.6m 14s and forecast to arrive on Saturday (Oct 25) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave Type	Time (HST) & Date	Wave Height & Period
Next good surf (1 star+)	-	-
Best Surf	-	-
Most Powerful	8AM (Sat 25th Oct)	5ft (1.6m) 14s

Table - best surf conditions forecast for Waimanu Bay over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Light rain (total 8mm), mostly falling on Sat afternoon. Warm (max 26°C on Sat morning, min 23°C on Mon night). Wind will be generally light.									Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Wed afternoon. Warm (max 26°C on Tue morning, min 24°C on Tue morning). Wind will be generally light.
	Saturday 25			Sunday 26			Monday 27			Tuesday 28			Wednesday 29			Thursday 30			Friday 31
	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	1	0	1	0	0	0	1	0	0	0	0	1	1	0	0	0	0	0	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	NNW	NNW	NNW	NNW	E	E	NNW	NNW	NNW	E	NNW	NNW	NNW	N	N	E	E	E	E	E	E
Period(s) (?)	14	13	12	12	7	7	11	11	12	8	11	12	11	11	10	7	7	7	7	7	7
Wave Graph (?)
kJ (?)	892	653	393	306	302	239	221	186	260	191	221	210	205	256	254	279	295	181	183	209	126
Wind (km/h)	ENE	E	E	E	E	E	E	E	E	ENE	E	E	E	E	E	E	E	E	E	E	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	cross	cross- on	cross	cross	cross- on	cross- on	cross- on	cross- on	cross	cross	cross- on	cross	cross	cross- on	cross- on	cross	cross- on	cross- on	cross
High Tide / height (m)		3:44PM 0.46		5:57AM 0.81	3:55PM 0.43		6:52AM 0.78			7:58AM 0.76			9:07AM 0.76		9:43PM 0.39	10:06AM 0.76		11:14PM 0.48	10:55AM 0.76		12:07AM 0.59
Low Tide / height (m)	12:09PM 0.40		10:05PM 0.14	1:28PM 0.42		10:37PM 0.17			11:18PM 0.21			12:21AM 0.27		5:22PM 0.32	2:14AM 0.32		5:36PM 0.27	4:05AM 0.34		5:56PM 0.21

	Saturday 25			Sunday 26			Monday 27			Tuesday 28			Wednesday 29			Thursday 30			Friday 31
Sunrise	6:20	-	-	6:20	-	-	6:20	-	-	6:22	-	-	6:22	-	-	6:22	-	-	6:22	-	-
Sunset	-	5:52	-	-	5:51	-	-	5:50	-	-	5:50	-	-	5:49	-	-	5:49	-	-	5:47	-

Rain (mm)	-	5	2	1	-	-	-	-	-	-	-	-	-	2	1	-	-	-	-	-	3
Temp. °C	26	25	25	26	26	25	26	25	24	26	26	25	26	26	25	26	26	25	27	26	25
Feels °C (?)	25	26	25	26	27	26	27	27	24	26	26	25	25	26	25	25	26	25	27	27	27

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for HAW - Big Island

Wind Update Continuing clean conditions at Waimanu Bay (calm at Kapulena wx 12 km from Waimanu Bay). 1.9m 7s swell from the ENE with a 1.5m 16s long period groundswell from the NNW and a 1.2m 16s long period groundswell, also from the NNW. 3 swells combining so expect closeout sets.
2 hours 34 minutes ago Waimanu Bay

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2 h 34 min ago

5 km/h

Clean

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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Waimanu Bay surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

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 12 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.