Surf Forecasts:
Waimanalo surf forecast from 3 Aug 2026:
- Most powerful swell: Sunday 2 Aug, 8PM (local time) - 7ft (2.2m), 8s period, ENE swell with 634 kJ wave energy.
Best Forecast Surf Conditions for Waimanalo this week:
The most powerful waves expected at Waimanalo in the next 16 days are 2.2m 8s and forecast to arrive on Sunday (Aug 02) 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 0.3m 12s period and expected on Thursday (Aug 06) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sun 2nd Aug) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
The Lowdown
Alright surfers, Rusty here. Let’s get stuck into this. The honest truth for the next couple of weeks is that things are pretty grim. We’ve got a long run of onshore and cross-onshore winds, mostly out of the ENE, and the swell’s not cooperating either. There’s no standout quality on offer, so if you’ve got other plans, you’re not missing much. Here’s the rundown.
Right off the bat, things are a mess. This Sunday (August 2nd) kicks off with onshore wind screaming in at 22 mph and a messy 7ft ENE swell with only 8 seconds between waves. The combined energy is moderate (847), but with that wind, forget about it – it’s pure chop. That trend holds through the whole first week. Monday and Tuesday see slightly smaller swell, 5ft to 5ft, but the wind stays onshore and moderate to fresh. The combined energy drops into the high hundreds and low four hundreds. Not a single session worth pulling on a wetsuit for.
We roll into Thursday the 6th and the swell drops right off to 3ft – 4ft, short-period junk at 6 to 8 seconds, energy down to 140-162. Still onshore. By Friday the 7th, the swell bottoms out at 3ft with 5 second period and a combined energy of just 78. That’s weak. The only change is the wind from Saturday the 8th goes cross-onshore, but it’s also gusting to 19 mph, making it lumpy. This stuff carries all the way through to Sunday the 16th and Monday the 17th. The swell starts to build again after the 13th, climbing to 8ft with 8-second periods and combined energy in the 600-680 range (strong), but the wind stays strong, cross-onshore, and messy. That’s kite-surfing weather, not proper surfing. The water temperature is sitting at 80°F, which is about average for this time of year, so no surprises there.
There is no good surf in this 16-day window. The whole run is dominated by onshore and cross-onshore ENE winds, poor wave quality, and no decent windows of clean swell. The break – Waimanalo – is exposed to this swell direction but it’s just getting hammered by the wrong wind. It’s a beach break that needs clean conditions, and it’s not getting them. If you’re desperate, the least terrible window might be the morning of Tuesday the 4th when the wind drops to 9 mph onshore and the period extends to 11 seconds, giving slightly better shape, but it’s still onshore and the wave comment says “poor surf conditions.” Not a recommendation. More of a “maybe if you’re bored.”
Bottom line: leave the board at home for a fortnight. The forecast can change, but right now it’s a long, flat, choppy stretch. Hang loose.
Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Mon morning, min 24°C on Sun night). Winds decreasing (fresh winds from the ENE on Sun afternoon, light winds from the ENE by Tue morning). | Days 5-7 Weather SummarySome drizzle, heaviest during Thu morning. Warm (max 26°C on Wed afternoon, min 25°C on Wed night). Mainly fresh winds. | |||||||||||||||||||
Sun 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | ||||||||||||||
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 8 | ENE 8 | ENE 8 | ENE 9 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 6 | ENE 8 | ENE 8 | ENE 5 | ENE 5 | E 6 | E 7 | ENE 7 | ENE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 650 | 499 | 280 | 331 | 336 | 452 | 379 | 411 | 275 | 203 | 88 | 67 | 146 | 37 | 33 | 48 | 239 | 206 | 232 | 371 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | on | on | on | cross-on | on | on | cross-on | on | cross-on | cross-on | cross-on | on | cross-on |
High Tide | 4:58PM0.57m | 5:48AM0.38m | 5:09PM0.52m | 7:16AM0.41m | 5:14PM0.48m | 9:27AM0.45m | 4:57PM0.44m | 11:19AM0.53m | 12:18PM0.61m | 1:01PM0.68m | ||||||||||
Low Tide | 11:50PM0.10m | 10:52AM0.19m | 00:22AM0.07m | 11:44AM0.27m | 1:03AM0.04m | 1:35PM0.35m | 1:59AM0.02m | 3:11AM-0.00m | 4:25AM-0.03m | |||||||||||
 |  | | |  |  | | | | | |  | | | | |  | | |  | |
 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | 1 |
Temp °C | 25 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 22 | 22 | 25 | 25 | 25 | 26 | 27 | 26 | 26 | 26 | 25 | 25 | 24 | 25 | 24 | 25 | 25 | 24 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | E 14 | E 13 | N 6 | E 12 | E 12 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | NNW 8 | ENE 8 | ENE 7 | NE 7 | NE 11 | NE 10 | NE 10 | SSW 13 |
| kJ | 183 | 87 | 16 | 76 | 101 | 452 | 379 | 411 | 275 | 203 | 88 | 59 | 12 | 37 | 21 | 25 | 42 | 28 | 17 | 17 |
Swell 2 Height (m) Direction Period (s) | N 9 | N 8 | E 13 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | S 13 | NNE 9 | NNE 8 | NNE 8 | NNW 8 | S 11 | NNW 7 | NNW 7 | NNW 7 | N 7 | SSW 14 | SSW 14 | S 10 |
| kJ | 14 | 12 | 84 | 15 | 14 | 14 | 13 | 14 | 8 | 7 | 6 | 14 | 10 | 10 | 10 | 9 | 4 | 20 | 19 | 8 |
Swell 3 Height (m) Direction Period (s) | SW 13 | SSW 13 | N 8 | N 8 | N 7 | SSE 12 | S 13 | NNE 9 | S 13 | S 12 | S 12 | S 12 | N 8 | S 11 | NE 10 | ENE 12 | S 11 | N 6 | SSE 10 | SSW 18 |
| kJ | 7 | 17 | 10 | 4 | 4 | 15 | 13 | 8 | 13 | 12 | 11 | 11 | 4 | 9 | 14 | 15 | 9 | 3 | 9 | 30 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | — | — | — | — | — | ENE 5 | ENE 6 | ENE 8 | ENE 5 | ENE 5 | ENE 5 | E 6 | E 7 | ENE 7 | ENE 7 |
| kJ | 650 | 499 | 280 | 331 | 336 | — | — | — | — | — | 53 | 67 | 146 | 28 | 33 | 48 | 239 | 206 | 232 | 371 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 52 | 46 | 15 | 50 | 15 | 44 | 9 | 15 | 15 | 15 | 44 | 15 | 17 | 17 | 44 | 44 | 44 | 44 | 50 | 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.
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