Waimea Rivermouth Surf Forecast

/ HAW – Kaua'i (25 breaks) / Hawaii (267 breaks) /

USA (1297 breaks) / Lat Long: (21.95° N 159.67° W)

Surf Forecasts:

Waimea Rivermouth surfForecast / HAW – Kaua'i / USA

12 Day Weather and Surf, issued 1 pm Monday 15 Sep 2025 HST

Forecast update in hr min s Forecast update imminent

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

Today's Waimea Rivermouth sea temperature is 27.8° C
(Which is slightly warmer than usual)

Best Forecast Surf Conditions for Waimea Rivermouth this week:

The surf forecast for Waimea Rivermouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 15) at 5PM. The primary swell is predicted to be 0.4m and 10s period with a secondary swell of 0.5m and 5s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Waimea Rivermouth in the next 12 days are 1.7m 8s and forecast to arrive on Thursday (Sep 18) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Wednesday (Sep 17) at 5PM.

Wave Type	Time (HST) & Date	Wave Height & Period
Next good surf (1 star+)	5PM (Mon 15th Sep)	1.5ft (0.4m) 10s
Best Surf	11AM (Sat 20th Sep)	2.5ft (0.8m) 16s
Most Powerful	2PM (Thu 18th Sep)	5.5ft (1.7m) 8s

Table - best surf conditions forecast for Waimea Rivermouth over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

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	Short Range Forecast Mostly dry. Warm (max 28°C on Mon afternoon, min 24°C on Tue night). Wind will be generally light.											Days 3-6 Weather Summary Mostly dry. Warm (max 28°C on Thu afternoon, min 25°C on Thu night). Wind will be generally light.
	Mon 15		Tuesday 16			Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21
	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM
Rating (10 max)	1	1	1	1	2	2	0	1	1	1	2	1	1	2	3	3	2	2	2	0	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	SSE	SSW	SSW	SSW	ESE	ESE	SE	E	ESE	E	E	E	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW
Period(s) (?)	10	13	12	13	6	7	9	6	7	6	7	6	18	17	16	16	15	14	13	13	13
Wave Graph (?)
Energy (?)	55	139	88	95	212	288	47	186	433	431	364	193	132	381	517	545	457	289	204	181	131
Wind (km/h)	NE	ENE	E	E	ENE	E	E	ENE	E	E	ENE	E	ENE	ENE	E	E	ENE	E	E	E	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off
High Tide / height (m)		11:50PM 0.18	12:51PM 0.57		12:57AM 0.22	1:37PM 0.57		1:43AM 0.27		2:15PM 0.56	2:23AM 0.32		2:46PM 0.53	3:00AM 0.37		3:13PM 0.50	3:35AM 0.41		3:37PM 0.45	4:10AM 0.45
Low Tide / height (m)		8:14PM 0.14	5:05AM 0.08		8:30PM 0.13	6:18AM 0.06		8:48PM 0.12	7:15AM 0.05		9:05PM 0.11	8:03AM 0.06		9:21PM 0.09	8:46AM 0.07		9:36PM 0.08	9:28AM 0.10		9:52PM 0.07	10:08AM 0.13

	Mon 15		Tuesday 16			Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21
Sunrise	-	-	6:24	-	-	6:24	-	-	6:26	-	-	6:26	-	-	6:26	-	-	6:26	-	-	6:26
Sunset	6:42	-	-	6:40	-	-	6:39	-	-	6:38	-	-	6:37	-	-	6:37	-	-	6:36	-	-

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	28	26	27	27	26	27	27	26	27	28	26	28	28	27	28	27	26	27	28	26	27
Feels °C (?)	28	28	28	28	27	28	28	27	26	28	27	29	29	29	30	29	27	28	29	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 - Kaua'i

Wind Update The wind is still cross-off at Waimea Rivermouth (light winds from the NE at BUOY-NWWH1 33 km from Waimea Rivermouth). 0.9m 8s swell from the ESE with a 0.4m 12s groundswell from the SSW and a 0.3m 10s swell from the S. 3 swells combining to make bigger set waves.
1 hour 17 minutes ago Waimea Rivermouth

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33 km away, 1 h 17 min ago

17 km/h

0.0

27.8

Air / Water (°C)

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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 Waimea Rivermouth 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 Waimea Rivermouth Surf forecast

The above surf forecast table for Waimea Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Waimea Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Waimea Rivermouth 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 (Waimea Rivermouth) 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 Waimea Rivermouth 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.

Are you planning a vacation in Kaua'i? If you are looking for accommodation near Waimea Rivermouth, camping, hotels and condos and appartments in Kaua'i, consider staying in Nawiliwili which is 32 km (20 miles) away. Alternatively, find information about places to stay and car hire in Lihue - Kauai which is 34 km (21 miles) away