Waimea Rivermouth surfForecast / HAW – Kaua'i / USA

information circle12 Day Weather and Surf, issued 7 am Monday 14 Jul 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
26.2° C
(Which is normal for this time of year)


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 (Jul 14) at 11AM. The primary swell is predicted to be 1.3m and 6s period with a secondary swell of 0.6m and 10s. The wind is predicted to be cross-shore 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 Monday (Jul 21) 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 1.9m 6s period and expected on Friday (Jul 18) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Mon 14th Jul)4.5ft (1.3m) 6s
Best Surf 5PM (Sun 20th Jul)7ft (2.2m) 6s
Most Powerful 2PM (Mon 21st Jul)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
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
Friday
25
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
Swell
Height Map
Wave Height (m) & direction (?)
1.3
E
1.6
ESE
0.5
S
0.4
S
0.5
S
0.4
SSE
1.6
E
1.6
E
1.6
E
1.4
E
1.4
E
1.3
E
1.3
E
0.4
SW
0.4
SSW
0.4
SW
0.5
SW
0.5
SW
0.4
SSW
2.2
E
0.7
SE
0.7
SE
0.8
SE
0.4
SW
1.2
E
0.4
SW
1.4
E
1.3
E
1.9
E
1.5
E
1.6
E
1.7
E
1.8
E
1.5
E
0.8
SE
1.1
E
Period(s) (?)6616151410777777716161615151569991571467777776106
Wave
Graph
(?)Metric surfscale
Energy (?)28833724317718350346359333258250214218117138114133164160556133126137116240110259329565434474521394385194248
Wind
(km/h)
15
E
5
E
10
NE
10
E
15
E
20
ENE
10
E
15
E
15
ENE
10
E
15
ENE
15
ENE
10
ENE
10
ENE
20
ENE
15
E
15
E
20
ENE
15
E
10
ENE
15
ENE
15
E
10
ENE
15
ENE
15
E
10
ENE
15
ENE
15
E
20
ENE
20
ENE
15
E
10
E
15
ENE
15
E
15
E
15
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crossglassoffcross-
off
cross-
off
cross-
off
crosscrosscross-
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
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
High Tide
/ height (m)
6:37PM
0.52
7:31AM
0.26
7:08PM
0.46
8:53AM
0.31
7:37PM
0.39
10:18AM
0.38
8:05PM
0.32
11:35AM
0.46
8:32PM
0.26
12:37PM
0.53
1:30PM
0.59
11:38PM
0.16
2:17PM
0.63
1:07AM
0.16
3:01PM
0.65
2:10AM
0.17
3:42PM
0.66
3:02AM
0.19
4:20PM
0.64
3:49AM
0.21
4:55PM
0.61
4:36AM
0.23
Low Tide
/ height (m)
11:29AM
0.07
1:52AM
0.07
12:25PM
0.15
2:24AM
0.05
1:45PM
0.23
3:01AM
0.03
4:01PM
0.28
3:42AM
0.01
6:59PM
0.27
4:30AM
-0.01
5:23AM
-0.03
9:48PM
0.17
6:18AM
-0.05
10:15PM
0.14
7:11AM
-0.07
10:42PM
0.12
8:00AM
-0.08
11:10PM
0.12
8:47AM
-0.07
11:36PM
0.11
9:30AM
-0.05
12:02AM
0.11
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
Wednesday
23
Thursday
24
Friday
25
Sunrise6:03--6:03--6:03--6:03--6:05--6:05--6:05--6:05--6:05--6:07--6:07--6:07--
Sunset-7:24--7:24--7:23--7:23--7:23--7:23--7:22--7:22--7:22--7:22--7:22--7:21-
clearclearclearclearthunderstorm clearclearclearclearclearpart cloudclearpart cloudpart cloudclearclearthunderstorm clearclearthunderstorm clearclearpart cloudclearclearcloudpart cloudclearpart cloudpart cloudpart cloudpart cloudpart cloudclearpart cloudpart cloud
Rain (mm)
----1-----------2--2----------------
Temp. °C262725272725272725272725272726262725262725262625272725272725272725262625
Feels °C (?)262827292826282825282726282727262725272826272727282926282926282926272827

Short Range Forecast: Some drizzle, heaviest during Tue afternoon. Warm (max 27°C on Mon afternoon, min 23°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Sat afternoon. Warm (max 27°C on Thu morning, min 24°C on Thu night). Wind will be generally light.

Days 6-9 Weather Summary Light rain (total 2mm), mostly falling on Sun afternoon. Warm (max 27°C on Sun afternoon, min 23°C on Sun night). Wind will be generally light.

Long Range Forecast: Mostly dry. Warm (max 27°C on Wed morning, min 23°C on Fri night). Wind will be generally light.

  • 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 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

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