Surf Forecasts:
Waimanalo surf forecast from 20 Jul 2026:
- Most powerful swell: Sunday 26 Jul, 2PM (local time) - 5ft (1.5m), 16s period, E swell with 1,129 kJ wave energy.
Best Forecast Surf Conditions for Waimanalo this week:
The most powerful waves expected at Waimanalo in the next 16 days are 1.5m 16s and forecast to arrive on Sunday (Jul 26) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 16s period and expected on Monday (Jul 20) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Sun 26th Jul) | 5ft (1.5m) 16s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on offer for Waimanalo over the next couple of weeks.
Right off the bat, I gotta be straight with you: it’s a rough run. There’s a real dry spell to kick things off. From now until the end of July, the surf is just not happening. The wind is a constant problem, blowing onshore or cross-onshore, and the swell is short-period, lumpy stuff. The water temperature is sitting at 80°F which is pretty much bang on average for this time of year, so that’s the only thing that feels normal.
We’re looking at a solid gap of about ten days with no real surf to speak of. The first glimmer of hope doesn’t show up until the very end of the month. The only standout, and I mean the *only* one, is Thursday the 30th of July. The wind finally swings around to a light SSE, a cross-offshore breeze, and the forecast says "clean". That’s the magic word. We’ll see a 5ft to 5ft NE swell, with a period around 9 to 10 seconds. The combined wave energy is moderate (487 to 370), so it’s got a bit of push. The wind is only 3 mph, so it’s going to be glassy. This is your window. The break is exposed to the swell, and the optimum direction is NE, so it should be lining up alright. It’s a beginner-friendly spot, fairly consistent, and it’s worth noting that crowds can pop up sometimes, so get in early.
After that tiny window, it’s back to the grind. The wind swings back onshore, and the swell gets messy again. The second week of August looks pretty grim with more of the same onshore wind and poor surf conditions. There’s a pulse of bigger swell around the 28th of July, with 8ft to 8ft ENE swell and a long 13-second period, but the comments say "marginal" or "poor", and the wind is still onshore, so it’s going to be a washing machine. The energy is very strong (1960 to 2005), but it’s not going to be surfable. Honestly, for the rest of the run, it’s more of a kiteboarding show than a surf session.
So, bottom line: you’ve got one clean shot on Thursday the 30th of July. Otherwise, it’s a long wait. Don’t hold your breath.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Mon morning. Warm (max 26°C on Mon afternoon, min 24°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummarySome drizzle, heaviest during Thu morning. Warm (max 25°C on Wed afternoon, min 24°C on Wed night). Mainly strong winds. | |||||||||||||||||||
Sun 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | ||||||||||||||
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 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | NE 8 | E 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 284 | 195 | 240 | 256 | 210 | 176 | 200 | 230 | 153 | 156 | 242 | 298 | 298 | 371 | 471 | 513 | 572 | 419 | 517 | 615 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | on | cross-on | on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | on | cross-on | on | on | on | cross-on |
High Tide | 6:08PM0.51m | 9:13AM0.37m | 6:04PM0.45m | 11:19AM0.44m | 4:59PM0.41m | 12:21PM0.51m | 12:58PM0.56m | 1:29PM0.59m | 1:57PM0.62m | 10:51PM0.28m | ||||||||||
Low Tide | 1:25AM0.09m | 12:37PM0.29m | 2:03AM0.07m | 3:19PM0.35m | 2:49AM0.05m | 3:43AM0.04m | 4:39AM0.02m | 5:29AM-0.00m | 9:26PM0.24m | |||||||||||
 |  |  | |  | | |  | | | | | | | | | | | | | |
 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — |
 | 7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:13 | — | — | 7:13 | — |
mm | — | — | 1 | — | — | 1 | 1 | 1 | — | — | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 22 | 23 | 25 | 25 | 24 | 24 | 23 | 23 | 22 | 22 | 22 | 21 | 21 | 22 | 22 | 22 | 21 | 22 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | NNE 8 | NE 8 | S 16 | S 16 | S 15 | S 14 | S 14 | E 13 | E 12 | E 11 | E 12 | S 12 | S 13 | E 11 | SSW 18 | SSW 17 | SSW 16 | E 16 | E 15 | E 16 |
| kJ | 12 | 16 | 47 | 81 | 107 | 103 | 97 | 84 | 103 | 125 | 103 | 44 | 55 | 58 | 104 | 59 | 53 | 80 | 153 | 615 |
Swell 2 Height (m) Direction Period (s) | S 19 | S 18 | S 13 | SW 18 | E 12 | E 12 | E 14 | S 14 | SSE 13 | SSE 13 | S 13 | SSW 20 | SSW 20 | SSW 18 | S 12 | S 12 | SSW 20 | SSW 19 | SSW 19 | S 18 |
| kJ | 27 | 55 | 31 | 12 | 12 | 25 | 37 | 91 | 59 | 58 | 52 | 77 | 75 | 66 | 26 | 25 | 82 | 125 | 115 | 158 |
Swell 3 Height (m) Direction Period (s) | SSW 12 | S 11 | SW 18 | E 13 | SW 16 | E 15 | E 11 | S 26 | S 11 | S 10 | SSW 22 | NNW 10 | NNW 10 | S 13 | NNW 9 | SSW 21 | S 12 | SSW 16 | E 19 | S 12 |
| kJ | 15 | 10 | 13 | 3 | 11 | 17 | 22 | 53 | 20 | 19 | 91 | 10 | 9 | 31 | 8 | 44 | 24 | 50 | 62 | 3 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | NE 8 | ENE 8 |
| kJ | 284 | 195 | 240 | 256 | 210 | 176 | 200 | 230 | 153 | 156 | 242 | 298 | 298 | 371 | 471 | 513 | 572 | 419 | 517 | 517 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 120 | 15 | 15 | 44 | 17 | 44 | 44 | 44 | 44 | 50 | 44 | 51 | 116 | 50 | 52 | 117 | 44 | 44 | 116 | 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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