
Surf Forecasts:
Waimanalo surf forecast from 15 Jul 2026:
- Most powerful swell: Sunday 19 Jul, 5AM (local time) - 6ft (1.8m), 8s period, E swell with 407 kJ wave energy.
Best Forecast Surf Conditions for Waimanalo this week:
The most powerful waves expected at Waimanalo in the next 16 days are 1.8m 8s and forecast to arrive on Sunday (Jul 19) at 5AM. Winds are predicted to be cross-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 | 5AM (Sun 19th Jul) | 6ft (1.8m) 8s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
The Lowdown
Righto, grab a seat. Rusty here, and I’ve got the long-range look for you. Straight up, the 16-day window for Waimanalo is a tough one. We’re looking at a real dry spell here, with no standout days to get excited about. The whole run is basically a write-off for quality surf.
Let’s kick off from Wednesday, July 15th. All we’ve got is a weak, short-period 3ft ENE swell, but it’s coming in with a cross-onshore breeze that’s just ruining any chance of a clean wave. The water’s about average for this time of year, but the conditions are just poor. The combined swell energy is a meagre 134 – barely a whisper. This same story repeats itself right through the rest of the week and into the next. The swell direction is always from the ENE, which is not the optimum for this spot – it needs a NE direction to really work. The wind is a constant problem, mostly cross-on or onshore, keeping everything choppy and lumpy. We see a bit of a spike in energy around Sunday, July 19th, with a 5ft swell and energy hitting 362, but it’s still got that onshore wind. That’s not a surfer’s friend.
Heading into the second week, it’s the same script. The swell hovers around 3ft to 6ft, but the period is almost always short, 6–8 seconds, so it’s weak, crumbly, and gutless. The wind just won’t let up. By Monday, July 27th, the combined energy jumps to 584, and we’ve got 6ft swell, but it’s accompanied by a fresh cross-onshore breeze. That’s a messy, lumpy, blown-out beach break. The set-up there is a beach break, and with those conditions, honestly, it looks more interesting for kite surfing than paddle surfing. There’s no clean, offshore window on offer at all.
It’s a bummer, but it’s a blank run. The inconsistency here is pretty normal for this area when the winds lock in like this. Don’t hold your breath. Forecasts can change, but right now, there’s nothing to recommend.
Rusty.
Short Range ForecastSome drizzle, heaviest during Wed morning. Warm (max 25°C on Tue night, min 24°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummarySome drizzle, heaviest during Fri night. Warm (max 25°C on Fri night, min 24°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tue 21 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | NE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | E 6 | E 6 | E 7 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 7 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
156 | 105 | 89 | 178 | 147 | 131 | 188 | 183 | 175 | 209 | 115 | 166 | 320 | 333 | 270 | 273 | 209 | 150 | 88 | 142 | 192 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | on | cross-on | on | on | on | on | on | cross-on | cross-on | on |
High Tide | 2:18AM0.32m | 4:33PM0.73m | 3:19AM0.32m | 5:06PM0.69m | 4:23AM0.32m | 5:34PM0.63m | 5:36AM0.33m | 5:55PM0.57m | 7:07AM0.34m | 6:08PM0.51m | 9:13AM0.37m | 6:04PM0.45m | 11:19AM0.44m | 4:59PM0.41m | |||||||
Low Tide | 10:36PM0.21m | 8:49AM-0.11m | 11:10PM0.19m | 9:34AM-0.06m | 11:44PM0.16m | 10:16AM0.02m | 00:18AM0.13m | 10:57AM0.11m | 00:51AM0.11m | 11:40AM0.20m | 1:25AM0.09m | 12:37PM0.29m | 2:03AM0.07m | 3:19PM0.35m | |||||||
— | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | |
7:15 | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:14 | |
mm | — | 1 | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 26 | 26 | 25 | 25 | 25 | 24 | 24 | 24 | 23 | 23 | 24 | 24 | 24 | 23 | 22 | 23 | 24 | 23 | 24 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | NE 7 | N 8 | NNE 8 | SSW 16 | SSW 16 | NNE 7 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | NNE 7 | NNE 8 | NNE 7 | NNE 7 | NNE 7 | NE 8 | S 16 | S 16 | E 8 | S 14 | S 14 |
156 | 29 | 65 | 48 | 25 | 42 | 21 | 50 | 49 | 42 | 28 | 36 | 31 | 29 | 20 | 16 | 47 | 81 | 40 | 103 | 99 | |
Swell 2 Height (m) Direction Period (s) | E 8 | SSW 13 | SSW 18 | SSE 8 | SSW 13 | SSW 17 | S 18 | SW 16 | S 7 | W 14 | SSW 14 | SSW 14 | SSW 12 | SSW 12 | S 19 | S 18 | S 13 | SW 18 | S 15 | E 13 | E 13 |
28 | 16 | 30 | 7 | 17 | 29 | 24 | 10 | 1 | 4 | 36 | 39 | 30 | 15 | 27 | 55 | 31 | 13 | 107 | 31 | 53 | |
Swell 3 Height (m) Direction Period (s) | SSW 17 | SSW 18 | SSE 10 | W 16 | W 15 | SSW 13 | SSE 7 | W 14 | W 14 | S 10 | SE 9 | SE 9 | S 21 | S 19 | SSW 12 | SSW 11 | SW 18 | SE 6 | E 15 | E 11 | SSE 8 |
29 | 30 | 9 | 19 | 17 | 17 | 5 | 4 | 4 | 2 | 3 | 3 | 8 | 29 | 15 | 12 | 13 | 2 | 17 | 10 | 6 | |
Wind waves Height (m) Direction Period (s) | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | E 6 | E 6 | E 7 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 7 | ENE 7 | ENE 7 |
— | 105 | 89 | 178 | 147 | 131 | 188 | 183 | 175 | 209 | 115 | 166 | 320 | 333 | 270 | 273 | 209 | 150 | 88 | 142 | 192 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 17 | 18 | 9 | 15 | 44 | 50 | 44 | 44 | 44 | 44 | 44 | 50 | 44 | 44 | 44 | 15 | 15 | 44 | 15 | 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.











