
Surf Forecasts:
Waimanalo surf forecast from 7 Aug 2026:
- Most powerful swell: Sunday 9 Aug, 11PM (local time) - 7ft (2.1m), 7s period, ENE swell with 397 kJ wave energy.
Best Forecast Surf Conditions for Waimanalo this week:
The most powerful waves expected at Waimanalo in the next 16 days are 2.1m 7s and forecast to arrive on Sunday (Aug 09) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 16s period and expected on Thursday (Aug 13) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Sun 9th Aug) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
The Lowdown
Alright, Rusty here. Let me tell you how it's looking for the next couple of weeks.
Honestly, mate, I'm a bit gutted to say it, but the outlook for Waimanalo is a long, frustrating stretch of "poor surf conditions." We're looking at a solid 16-day window with no real green lights. The consistent onshore wind from the ENE is just killing it, with a strong breeze gusting up to 25 mph at times, which is going to shred any chance of clean faces. The swell is on the rise, but it's all windswell with a short, choppy period, so it's just messy.
The first real pulse of energy comes in around August 10th, where the swell starts to build, but the wind is still cranking onshore. By August 15th and 16th, the combined energy kicks up to strong levels (439 on Saturday, 612 on Sunday), with waves pushing 7 ft to 7 ft. But again, it's all onshore slop. The water temp is sitting around 80°, which is about normal for this time of year, but you won't care about the water temp when you're getting battered by that wind.
The biggest swell event looks like it's building toward August 17th and 18th, with the combined energy hitting a massive 829 on the 17th. That's a lot of power in the water, but with a short period and onshore wind, it's going to be a washing machine. For a beginner-friendly break like Waimanalo, waves over 5 ft start to get hairy, and anything over 8 ft is expert-only, but the wind is the real problem here. If you're a kite surfer, this setup is going to be way more interesting than a paddle session.
There's a slight glimmer on August 19th, where the wind finally drops to a gentle breeze, but the swell is dropping and the period is still short. It's a long wait for nothing. This is a tough run, folks. The forecast can always change, but as it stands, I'd say give it a miss and wait for a better window.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Fri afternoon, min 25°C on Fri morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Mon morning, min 25°C on Mon morning). Mainly fresh winds. | ||||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | ENE 5 | ENE 5 | ENE 6 | ENE 6 | E 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 8 | ENE 8 | E 7 | E 7 | ENE 7 | E 6 | E 6 | ENE 6 | ENE 6 | E 6 | ENE 6 | ENE 7 |
Wave Graph | |||||||||||||||||||||
37 | 50 | 135 | 165 | 188 | 316 | 278 | 302 | 382 | 316 | 251 | 277 | 245 | 245 | 194 | 182 | 160 | 205 | 182 | 218 | 308 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross-on | cross-on | on | cross-on | on | on | cross-on | on | on | on |
High Tide | 12:18PM0.61m | 1:01PM0.68m | 1:40PM0.72m | 11:41PM0.30m | 2:17PM0.74m | 00:48AM0.34m | 2:50PM0.74m | 1:43AM0.37m | 3:21PM0.72m | 2:36AM0.40m | 3:49PM0.69m | 3:28AM0.42m | |||||||||
Low Tide | 4:25AM-0.03m | 5:29AM-0.07m | 8:45PM0.24m | 6:24AM-0.09m | 8:55PM0.22m | 7:12AM-0.10m | 9:16PM0.20m | 7:57AM-0.08m | 9:41PM0.17m | 8:39AM-0.03m | 10:07PM0.14m | ||||||||||
6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 26 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 26 | 26 | 26 | 26 |
Feels °C | 25 | 26 | 24 | 24 | 24 | 23 | 23 | 23 | 24 | 25 | 25 | 26 | 25 | 24 | 23 | 22 | 22 | 25 | 24 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | ENE 7 | NNW 7 | NE 11 | NE 10 | NE 10 | SSW 13 | NE 10 | NNW 11 | NNW 10 | NNW 9 | NNW 8 | NNW 8 | SSW 15 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 |
21 | 9 | 41 | 37 | 34 | 17 | 14 | 23 | 33 | 27 | 24 | 13 | 42 | 40 | 62 | 155 | 152 | 257 | 183 | 161 | 112 | |
Swell 2 Height (m) Direction Period (s) | NE 10 | NE 12 | N 7 | N 6 | SSW 14 | SSW 18 | SSW 13 | S 18 | S 16 | SSW 16 | SSW 15 | SSW 15 | NNW 8 | SSE 9 | S 20 | SSW 13 | SSW 13 | NNW 7 | NNW 7 | NNW 7 | NE 11 |
14 | 23 | 4 | 3 | 19 | 30 | 17 | 24 | 20 | 49 | 45 | 44 | 11 | 7 | 119 | 54 | 55 | 5 | 5 | 5 | 5 | |
Swell 3 Height (m) Direction Period (s) | NNW 7 | S 11 | S 11 | SSW 14 | N 6 | S 10 | N 12 | SSW 13 | SSW 12 | SSE 10 | SSW 12 | SSE 9 | S 11 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | W 9 | NE 11 | N 7 |
9 | 9 | 9 | 20 | 3 | 8 | 11 | 16 | 14 | 9 | 14 | 8 | 10 | 5 | 5 | 5 | 5 | 5 | 2 | 5 | 1 | |
Wind waves Height (m) Direction Period (s) | ENE 5 | ENE 5 | ENE 6 | ENE 6 | E 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 8 | ENE 8 | E 7 | E 7 | ENE 7 | E 6 | E 6 | ENE 6 | ENE 6 | E 6 | ENE 6 | ENE 7 |
37 | 50 | 135 | 165 | 188 | 316 | 278 | 302 | 382 | 316 | 251 | 277 | 245 | 245 | 194 | 182 | 160 | 205 | 182 | 218 | 308 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 44 | 44 | 45 | 50 | 50 | 44 | 45 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 50 | 44 | 44 | 55 | 44 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Waimanalo Surf forecast
The above surf forecast table for Waimanalo provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Waimanalo can be found by selecting the local surf guide option on the grey menu. Our Waimanalo 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 (Waimanalo) 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 Waimanalo 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.
Waimanalo is 7 km (4 miles) from Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.











