
Surf Forecasts:
Waimanalo surf forecast from 6 Aug 2026:
- Most powerful swell: Sunday 9 Aug, 8PM (local time) - 6ft (1.9m), 7s period, ENE swell with 375 kJ wave energy.
Best Forecast Surf Conditions for Waimanalo this week:
The most powerful waves expected at Waimanalo in the next 16 days are 1.9m 7s and forecast to arrive on Sunday (Aug 09) at 8PM. 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 18s period and expected on Wednesday (Aug 12) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sun 9th Aug) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's be straight with you – the next couple of weeks are looking pretty grim for a paddle. The whole 16-day window is gonna be a battle with the wind. We've got a constant ENE breeze, and it's rarely doing us any favours. Mostly onshore or cross-onshore, and it's gonna be a fresh breeze most days, sometimes even a strong one. That's going to chop things up and make it pretty messy.
The only spot on the cards is Waimanalo, and honestly, it's a tough one to call a standout. The swell is coming from the ENE, which is pretty much the same direction as the wind, so it's going to be bumpy. The water temperature is about normal for this time of year, so no surprises there.
For the first few days, from Thursday the 6th of August through the weekend, the swell is small, around 3ft to 5ft, but the period is short – only 5 to 7 seconds. That's weak, windswell stuff with combined wave energy (89 to 215) that's just not gonna have any push. The wind is on it, so it's gonna be a choppy, blown-out mess. Not worth getting wet for.
Things actually start to pick up in size from Sunday the 9th of August, with the swell building to 6ft, then 7ft, and even hitting 8ft by Monday the 17th of August. The combined energy gets up there, reaching (856), which is a lot of energy. But here's the catch – the wind is howling. 18 to 25 mph from the same ENE direction. It's a cross-onshore or onshore mess. At 8ft, that's expert-only territory, and with that wind, it's going to be a washing machine. Honestly, for a beach break like Waimanalo, with that much swell and that much wind, it looks more interesting for the kite surfers than us paddle surfers.
The last couple of days, around the 20th and 21st of August, the wind finally drops a little, and the swell direction shifts to the NE with a slightly longer period of 9 seconds. The wave energy is still moderate (325), but it's still cross-onshore. It's a small improvement, but still not good.
So, there's no real standout here. If you had to pick a time, maybe the last morning on the 21st of August. The wind is lighter, a light breeze, and the swell is a bit longer period, but it's still cross-onshore. It's a gamble, but it's the best of a bad bunch. Otherwise, save your energy. The forecast can always change, but right now, it's looking like a long, flat, windy run.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Thu afternoon, min 25°C on Thu morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Mon morning, min 25°C on Sun morning). Mainly fresh winds. | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
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 8 | ENE 6 | ENE 5 | ENE 5 | ENE 5 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | E 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 6 | ENE 6 |
Wave Graph | |||||||||||||||||||||
223 | 57 | 36 | 36 | 53 | 135 | 176 | 194 | 326 | 319 | 346 | 301 | 220 | 240 | 238 | 186 | 186 | 148 | 111 | 108 | 104 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross-on |
High Tide | 11:19AM0.53m | 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 | ||||||||||
Low Tide | 3:11AM-0.00m | 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 | |||||||||||
6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 26 |
Feels °C | 26 | 26 | 25 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 24 | 26 | 26 | 25 | 25 | 25 | 24 | 24 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | NNW 8 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | NE 11 | NE 10 | NE 10 | SSW 13 | NE 9 | NNW 11 | NNW 10 | NNW 9 | NNW 8 | NNW 8 | SSW 15 | SSW 14 | S 20 | S 18 | S 18 | S 16 |
13 | 43 | 32 | 21 | 45 | 41 | 36 | 16 | 17 | 14 | 23 | 33 | 27 | 24 | 13 | 42 | 40 | 119 | 157 | 221 | 257 | |
Swell 2 Height (m) Direction Period (s) | S 12 | NNW 8 | NNW 7 | NE 10 | NNW 7 | N 7 | N 6 | N 6 | N 6 | SSW 13 | S 18 | S 16 | SSW 16 | SSW 15 | SSW 15 | NNW 8 | SSE 9 | SSW 14 | SSW 13 | SSW 13 | SE 9 |
10 | 12 | 10 | 14 | 9 | 4 | 3 | 3 | 3 | 17 | 24 | 20 | 49 | 45 | 44 | 11 | 8 | 62 | 57 | 55 | 3 | |
Swell 3 Height (m) Direction Period (s) | NNE 8 | S 11 | S 11 | NNW 7 | NE 12 | S 11 | SSW 14 | SSW 14 | SSW 18 | N 12 | SSW 12 | SSE 10 | NE 8 | SSE 10 | SSE 9 | SSE 9 | NNW 7 | NNW 7 | NNW 7 | SE 9 | W 12 |
6 | 10 | 9 | 10 | 23 | 9 | 20 | 19 | 30 | 11 | 15 | 9 | 11 | 9 | 8 | 8 | 5 | 5 | 5 | 3 | 11 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 6 | ENE 5 | ENE 5 | ENE 5 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | E 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 6 | ENE 6 |
223 | 57 | 36 | 36 | 53 | 135 | 176 | 194 | 326 | 319 | 346 | 301 | 220 | 240 | 238 | 186 | 186 | 148 | 111 | 108 | 104 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 44 | 17 | 15 | 44 | 44 | 44 | 45 | 50 | 45 | 44 | 45 | 44 | 44 | 17 | 17 | 44 | 17 | 17 | 44 | 44 | 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.











