
Surf Forecasts:
Sandy Beach surf forecast from 17 Jul 2026:
- Most powerful swell: Wednesday 22 Jul, 11PM (local time) - 2.5ft (0.7m), 22s period, SSW swell with 489 kJ wave energy.
Best Forecast Surf Conditions for Sandy Beach this week:
The most powerful waves expected at Sandy Beach in the next 16 days are 0.7m 22s and forecast to arrive on Wednesday (Jul 22) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 14s period and expected on Friday (Jul 17) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Wed 22nd Jul) | 2.5ft (0.7m) 22s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, this is a tough one to call. The honest truth is, for the next 16 days, Sandy Beach is going to be a write-off. I’ve been staring at this forecast and there’s just nothing to get excited about for a long time. The first surf that’s even worth a mention isn’t until the 27th of July, and even then it’s only marginal.
For the first ten days, from Thursday the 16th right through to the 26th, the conditions are consistently poor. We’re looking at a constant cross-shore wind – mostly from the ENE – that’s blowing anywhere from 15 mph to 25 mph. That’s going to chop the hell out of the water. The swell is a mess, too. There’s a mix of weak, short-period windswell at 6 ft and some longer-period groundswell, but the wind just ruins it. The wave energy is moderate to strong (between 374 and 1688), but with that cross-shore breeze, it’s just lumpy, cross-chop slop. Not worth your time.
Starting Monday the 27th of July, the wind drops a notch. It’s still a cross-shore from the ENE, but only 15 mph, so it’s a moderate breeze. The swell is a 5 ft groundswell from the East with a long 16-second period. The combined energy is strong (2063), which is promising, but the conditions are still listed as “marginal” with a cross-chop. It’s the best we’ve got all fortnight, but it’s a far cry from good. The tide might be a factor. It’s a spot for the desperate, not for a fun session.
Tuesday the 28th of July looks a tad better. The wind eases further to 12 mph from the ENE, still cross-shore. The swell is back up to 7 ft from the ENE with a 14-second period. This is a lot of water, and the energy is very strong (1798). This is expert territory – over 8 ft is too big for most, but 7 ft is still a solid, powerful wave. With a long period like that, it’s going to be a proper groundswell set with long lulls between them. At a beach-and-reef setup like Sandy Beach, the long period might make the waves break a bit too straight, but the extra power is there. The wind isn’t perfect, but it’s the best alignment in the whole outlook.
Honestly, if you’re a kite surfer, the whole period from the 24th through the 28th might look more interesting with that strong to moderate wind and decent swell. But for a paddle surfer, it’s a long wait for a very average reward. The water temperature is currently 79°, which is about average for this time of year with a normal anomaly of 0.4°.
So, to sum it up: don’t hold your breath. The 27th and 28th of July are the only shots you’ve got, and they’re more about hoping for a clean-up than a guarantee. Forecasts can change, but right now, it’s a lean run.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Thu afternoon, min 24°C on Thu night). Mainly fresh winds. | Days 5-7 Weather SummarySome drizzle, heaviest during Mon night. Warm (max 26°C on Mon afternoon, min 24°C on Sun night). Mainly fresh winds. | |||||||||||||||||||
Thu 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||
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) | SSW 17 | ENE 6 | ENE 7 | SSW 16 | SSW 14 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | S 16 | S 15 | S 14 | S 14 | S 13 | E 13 | SSW 23 | SSW 22 |
Wave Graph | ||||||||||||||||||||
195 | 117 | 134 | 196 | 145 | 247 | 302 | 314 | 285 | 243 | 232 | 165 | 321 | 339 | 329 | 302 | 273 | 165 | 426 | 363 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on |
High Tide | 4:58PM0.72m | 5:33AM0.31m | 5:35PM0.64m | 6:37AM0.35m | 6:10PM0.55m | 7:46AM0.40m | 6:42PM0.45m | 8:59AM0.45m | 7:13PM0.37m | 10:08AM0.51m | 7:46PM0.29m | 11:08AM0.55m | 8:50PM0.23m | |||||||
Low Tide | 00:20AM0.02m | 10:55AM0.08m | 00:53AM0.03m | 11:55AM0.16m | 1:26AM0.03m | 1:10PM0.23m | 1:58AM0.03m | 2:57PM0.28m | 2:33AM0.04m | 5:25PM0.28m | 3:12AM0.05m | 7:38PM0.23m | 3:57AM0.05m | |||||||
— | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | |
7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 25 | 24 | 24 | 23 | 24 | 23 | 22 | 21 | 21 | 23 | 22 | 23 | 25 | 24 | 24 | 23 | 23 | 23 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | W 14 | SW 14 | W 14 | SSW 16 | NE 7 | SSW 13 | SSW 14 | SSW 14 | SSW 13 | S 13 | SSW 12 | S 14 | S 16 | S 15 | S 14 | S 14 | S 13 | E 13 | S 13 | S 13 |
203 | 211 | 144 | 196 | 89 | 141 | 160 | 156 | 92 | 89 | 44 | 142 | 321 | 339 | 329 | 302 | 273 | 165 | 212 | 157 | |
Swell 2 Height (m) Direction Period (s) | SSW 13 | W 14 | SW 16 | W 14 | SSW 14 | WNW 13 | WNW 13 | W 12 | S 19 | S 18 | S 18 | S 16 | SW 18 | SW 16 | SW 17 | SW 16 | E 14 | S 13 | E 12 | E 12 |
113 | 148 | 125 | 98 | 145 | 57 | 56 | 28 | 66 | 106 | 97 | 135 | 81 | 69 | 72 | 68 | 97 | 126 | 153 | 144 | |
Swell 3 Height (m) Direction Period (s) | SSW 17 | SSW 18 | SSW 12 | SSW 12 | W 13 | SW 15 | SSE 9 | SSE 9 | W 12 | W 12 | NE 8 | SW 18 | W 12 | E 12 | E 12 | E 11 | E 11 | S 11 | SSW 23 | SSW 22 |
195 | 60 | 55 | 55 | 90 | 55 | 8 | 8 | 25 | 25 | 15 | 83 | 11 | 12 | 25 | 39 | 37 | 82 | 426 | 363 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 6 | ENE 7 | ENE 7 | E 6 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 |
66 | 117 | 134 | 138 | 60 | 247 | 302 | 314 | 285 | 243 | 232 | 165 | 169 | 148 | 120 | 120 | 153 | 132 | 105 | 194 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 47 | 47 | 47 | 47 | 47 | 55 | 55 | 47 | 47 | 47 | 16 | 47 | 16 | 16 | 47 | 47 | 47 | 47 | 48 | 47 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Sandy Beach Surf forecast
The above surf forecast table for Sandy Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sandy Beach can be found by selecting the local surf guide option on the grey menu. Our Sandy Beach 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 (Sandy Beach) 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 Sandy Beach 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.
Sandy's Beach is 15 km (9 miles) from the city of 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.










