
Surf Forecasts:
Waimanalo surf forecast from 10 Sep 2026:
- Most powerful swell: Friday 11 Sep, 8PM (local time) - 4.5ft (1.3m), 11s period, ENE swell with 346 kJ wave energy.
Best Forecast Surf Conditions for Waimanalo this week:
The most powerful waves expected at Waimanalo in the next 16 days are 1.3m 11s and forecast to arrive on Friday (Sep 11) 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 0.4m 18s period and expected on Wednesday (Sep 16) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Fri 11th Sep) | 4.5ft (1.3m) 11s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
The Lowdown
Alright folks, it’s Rusty here. I’ve scanned the charts for our local stretch, and I gotta be straight with you – it’s gonna be a rough 16-day grind. The models are showing a whole lot of nothing good for a solid two weeks.
There’s only one spot lighting up, and that’s Waimanalo. But for the first 15 days, it’s a brutal run of straight-up poor conditions. The swell is coming in from the east and northeast, but the wind is just relentless. From the 9th of September all the way through the 23rd, it’s a constant onshore or cross-onshore breeze, mostly from the ENE, blowing at 9 to 22 mph. That’s just going to be choppy, lumpy, and messy. The swell height stays mostly between 3.3ft and 6.2ft, but with that wind, it’s not rideable. The combined energy is moderate – figures like 361, 493, and 464 – but it’s all wasted energy. The water temp is sitting at 80.6°, which is about average for the time of year, but who cares when the lineup is a washing machine.
We’re looking at a massive gap with no recommendations. The only light at the end of this tunnel, and I mean the only one, is a brief window on the 24th of September. On Thursday afternoon, the wind finally looks like it might cooperate. We’re seeing a light cross-offshore breeze from the SSW at 6 mph, and the forecast actually says “expect good surf conditions.” The swell will be small, around 3.6ft from the east, with a period of 8 seconds. The combined energy is 267, which is moderate. Because the wind will be clean, this is the one chance to get a few small, clean waves. It’s the standout, but only because everything else is a total write-off.
For the rest of the run, the setup is so poor that it’s more interesting for the kite surfers than us paddle guys. Hang in there, but keep your expectations real low.
Short Range ForecastLight rain (total 4mm), mostly falling on Wed night. Warm (max 27°C on Wed afternoon, min 24°C on Fri night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Mon afternoon, min 24°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | ||||||||||||||
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) | E 13 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | E 7 | E 11 | E 10 | ENE 10 | ENE 10 | NNE 9 | NE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 | NE 8 | NE 7 | ENE 8 |
Wave Graph | ||||||||||||||||||||
168 | 204 | 237 | 218 | 181 | 97 | 238 | 221 | 160 | 125 | 132 | 107 | 107 | 123 | 100 | 149 | 135 | 94 | 105 | 176 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | cross-on |
High Tide | 2:10PM0.68m | 1:57AM0.46m | 2:33PM0.65m | 2:42AM0.50m | 2:52PM0.60m | 3:26AM0.53m | 3:07PM0.55m | 4:11AM0.55m | 3:19PM0.50m | 4:57AM0.55m | 3:24PM0.45m | 5:47AM0.53m | 3:20PM0.41m | |||||||
Low Tide | 8:24PM0.14m | 7:47AM0.03m | 8:43PM0.10m | 8:28AM0.08m | 9:04PM0.07m | 9:09AM0.14m | 9:26PM0.05m | 9:50AM0.20m | 9:48PM0.03m | 10:35AM0.25m | 10:11PM0.03m | 11:26AM0.30m | 10:35PM0.05m | |||||||
— | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:34 | — | |
mm | — | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 |
Temp °C | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 27 | 27 |
Feels °C | 30 | 29 | 26 | 25 | 24 | 24 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 24 | 26 | 27 | 28 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | E 13 | E 12 | E 12 | E 11 | NNE 8 | E 11 | E 10 | NE 9 | NNE 9 | NNE 9 | NE 9 | NE 9 | NE 9 | NE 8 | ESE 7 | NE 8 | NE 8 | E 8 | NNE 8 |
117 | 158 | 104 | 72 | 94 | 58 | 238 | 221 | 75 | 99 | 132 | 107 | 107 | 123 | 100 | 5 | 135 | 94 | 46 | 25 | |
Swell 2 Height (m) Direction Period (s) | NW 10 | NW 8 | NW 8 | NW 9 | SSW 12 | E 11 | NNE 8 | NE 7 | SSW 16 | SW 16 | E 9 | SSW 15 | SW 15 | SE 8 | ESE 8 | SSW 22 | ESE 7 | E 8 | SSW 20 | E 11 |
110 | 57 | 20 | 13 | 14 | 89 | 72 | 51 | 24 | 10 | 79 | 21 | 8 | 3 | 6 | 45 | 5 | 34 | 37 | 39 | |
Swell 3 Height (m) Direction Period (s) | E 13 | SSW 13 | SSW 13 | SSW 13 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | NW 8 | SW 13 | NW 15 | SE 10 | SE 9 | SW 12 | SE 8 | SE 8 | SSE 8 | SW 20 | E 12 | SW 19 |
168 | 34 | 33 | 32 | 26 | 26 | 22 | 22 | 3 | 7 | 8 | 4 | 3 | 6 | 2 | 2 | 7 | 60 | 11 | 95 | |
Wind waves Height (m) Direction Period (s) | ENE 3 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 8 | — | ENE 10 | ENE 10 | — | E 9 | ENE 9 | ENE 5 | ENE 5 | NE 8 | — | — | NE 7 | ENE 8 |
1 | 204 | 237 | 218 | 181 | 97 | 183 | — | 160 | 125 | — | 57 | 101 | 59 | 39 | 149 | — | — | 105 | 176 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 14 | 14 | 44 | 44 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 30 | 15 | 9 | 14 | 21 | 15 | 9 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
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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.










