Surf Forecasts:
Waimanalo surf forecast from 13 Jul 2026:
- Most powerful swell: Sunday 19 Jul, 8AM (local time) - 6ft (1.9m), 7s period, E swell with 387 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 (Jul 19) at 8AM. 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 16s period and expected on Monday (Jul 20) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Sun 19th Jul) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
The Lowdown
Alright, this is Rusty, and I gotta be straight with you – it’s a tough stretch ahead for the surf. Let’s break it down.
The whole 16-day window is looking pretty grim for Waimanalo. Right from Monday, July 13th, we’ve got onshore wind smashing into the beach, making everything a mess. Swell is coming in from the ENE at around 5 ft to 6 ft, but with a short, weak period (6-8 seconds) and a fresh breeze locking it in, the wave quality is just poor. The combined energy is moderate (345 to 277), but that doesn’t matter when the wind is tearing it up. Tuesday, July 14th, through the weekend, it’s the same story: rain showers, onshore and cross-onshore winds, and choppy, lumpy conditions. The water temperature is 79°, which is about average for this time of year, so at least you won’t freeze while you’re getting skunked.
There’s a real gap here. For the first week, from July 13th to July 19th, there’s nothing to recommend. The swell is there, but it’s all wind-affected and ugly. The setup is a beach break, and with persistent strong onshore winds, this honestly looks more interesting for a kite surfer than a paddle surfer.
Then, the second week rolls in, and it’s just more of the same. From Monday, July 20th, all the way through the end of the 16 days, poor surf conditions are the dominant theme. The wind stays onshore or cross-onshore, and the swell stays short and weak. The only real change is a late burst of energy. On Monday, July 27th, the swell suddenly jumps to a very long period of 15 seconds from the east, with a tiny 3 ft to 3 ft height. The combined energy rockets up to 660, but it’s still a tiny wave. A long period swell like that is best for a point or reef, but at a beach break like Waimanalo, it’ll likely break too straight and be hard to catch. The wind is still onshore, so it’s a no-go.
The very last days, July 28th, show a bigger swell (5 ft to 6 ft) with a 13-second period and massive combined energy (1000-1221), but the wind is cross-onshore and choppy. It’s frustrating, because the energy is there, but the conditions aren’t. For a beginner-friendly break that’s already fairly consistent, it’s a real bummer of a forecast. There’s just no standout day in this 16-day window.
Rusty, signing off.
Short Range ForecastModerate rain (total 15mm), heaviest on Tue night. Warm (max 25°C on Wed afternoon, min 24°C on Mon morning). Mainly fresh winds. | Days 4-6 Weather SummarySome drizzle, heaviest during Thu morning. Warm (max 25°C on Thu morning, min 24°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | |||||||||||||||
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 8 | E 8 | NE 7 | NE 8 | NE 7 | ENE 7 | ENE 7 | NE 7 | ENE 6 | ENE 6 | ENE 7 | E 6 | ENE 6 | ENE 6 | E 7 | ENE 7 | E 6 | ENE 8 | ENE 7 | ENE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 345 | 277 | 144 | 242 | 248 | 194 | 139 | 105 | 176 | 155 | 123 | 247 | 194 | 160 | 150 | 226 | 261 | 221 | 375 | 276 | 206 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | on | on | on | cross-on | on | on |
High Tide | 3:15PM0.77m | 1:17AM0.31m | 3:55PM0.76m | 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 | ||||||||
Low Tide | 10:02PM0.22m | 8:04AM-0.15m | 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 | ||||||||
 |  |  |  | |  | | | | | | | | | | | |  | | | | |
 | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — |
 | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — |
mm | — | — | — | 1 | 2 | 4 | 4 | 2 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 25 | 24 |
Feels °C | 21 | 22 | 22 | 23 | 22 | 23 | 24 | 26 | 24 | 25 | 25 | 25 | 24 | 24 | 24 | 23 | 22 | 22 | 21 | 23 | 21 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SSW 15 | E 8 | SSW 14 | SSW 14 | E 8 | N 7 | NNE 8 | SSW 16 | NNE 7 | NNE 7 | SSW 14 | NNE 7 | NNE 7 | N 7 | NNE 7 | NNE 8 | NNE 8 | S 12 | NNE 8 | NNE 8 |
| kJ | 36 | 21 | 144 | 19 | 18 | 28 | 39 | 62 | 48 | 43 | 43 | 18 | 31 | 30 | 28 | 29 | 21 | 20 | 12 | 12 | 13 |
Swell 2 Height (m) Direction Period (s) | SSE 12 | SSE 12 | SSW 14 | SSW 19 | SSE 11 | SSW 17 | SSW 13 | SSE 10 | SSE 9 | SSW 16 | SSW 17 | SSE 7 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | S 12 | S 19 | SSW 12 | S 18 |
| kJ | 14 | 13 | 20 | 36 | 11 | 29 | 16 | 9 | 7 | 25 | 29 | 5 | 24 | 49 | 42 | 36 | 39 | 27 | 29 | 14 | 55 |
Swell 3 Height (m) Direction Period (s) | S 20 | SW 21 | N 8 | SSE 11 | SW 19 | SSW 13 | SSW 18 | SSW 18 | W 16 | W 15 | SSW 13 | SSW 17 | SW 16 | SE 8 | SSE 9 | SSW 9 | SSW 10 | SSW 9 | SW 8 | S 18 | SSW 11 |
| kJ | 8 | 17 | 6 | 11 | 14 | 16 | 30 | 30 | 19 | 17 | 16 | 30 | 10 | 2 | 8 | 8 | 9 | 7 | 3 | 26 | 12 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | NNE 7 | NE 7 | NE 8 | NE 7 | ENE 7 | ENE 7 | NE 7 | ENE 6 | ENE 6 | ENE 7 | E 6 | ENE 6 | ENE 6 | E 7 | ENE 7 | E 6 | ENE 8 | ENE 7 | ENE 7 |
| kJ | 345 | 277 | 91 | 242 | 248 | 194 | 139 | 105 | 176 | 155 | 123 | 247 | 194 | 160 | 150 | 226 | 261 | 221 | 375 | 276 | 206 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 44 | 44 | 15 | 15 | 44 | 15 | 9 | 44 | 44 | 44 | 50 | 44 | 44 | 45 | 45 | 50 | 50 | 44 | 44 | 44 | 15 |
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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