Surf Forecasts:
Sandy Beach surf forecast from 12 Jul 2026:
- Most powerful swell: Monday 13 Jul, 5AM (local time) - 7ft (2.2m), 7s period, ENE swell with 498 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 2.2m 7s and forecast to arrive on Monday (Jul 13) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 17s period and expected on Sunday (Jul 12) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Mon 13th Jul) | 7ft (2.2m) 7s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
Alright, this is Rusty, and I’m gonna level with you about Sandy Beach. This 16-day stretch is a real bummer. We’re staring down a long run of messy, cross-shore winds that are going to ruin just about everything. The first week and a half is a total loss, with the wind hammering from the ENE and the surf looking like a washing machine. The wave energy is only moderate, peaking around 697 (moderate wave energy) on the 13th, but it’s all wind-chop.
Around the 21st of July, things start to change. A long-period groundswell from the SSW starts to show up. The period stretches past 14 seconds and well into the 20s, which means real power. The combined energy jumps into the strong range, hitting 859 and 946 on the 23rd and 24th. But here’s the rub – the wind is still cross-shore from the ENE, keeping it lumpy. The water temp is about normal for this time of year, nothing crazy.
If you’re desperate for a paddle, the morning of the 21st of July is your best shot. It’s the only time that’s not called “poor,” just “marginal.” You’ve got a 0.7ft SSW swell with a 14-second period, so it’s proper groundswell. The wind is a moderate breeze from the ENE, so the cross-chop will be less nasty. It’s tiny, but it’s the cleanest window in the whole forecast. That long period on a beach break can make the waves a bit straight and tricky, but it’s all we’ve got. Don’t expect a crowd because the swell is inconsistent, but with conditions this average, it’s not a hotspot.
The rest of the second week is just more of the same bumpy, cross-shore grind. It’s one of those times when the exposed beach in a steady trade wind pattern just doesn’t give you anything. It’s not a spot that stays flat forever, but this pattern is locked in.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sat night, min 24°C on Sat night). Mainly strong winds. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Tue night. Warm (max 25°C on Wed morning, min 24°C on Tue night). Winds increasing (light winds from the E on Tue night, fresh winds from the ENE by Fri afternoon). | ||||||||||||||||||||
Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Sat 18 | |||||||||||||||
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) | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | NE 8 | NE 7 | ENE 7 | ENE 7 | SSW 16 | SSW 16 | SSW 17 | ENE 6 | NE 7 | SSW 16 | ENE 6 | ENE 6 | ENE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 379 | 397 | 419 | 393 | 383 | 322 | 231 | 257 | 210 | 140 | 114 | 77 | 314 | 175 | 195 | 103 | 102 | 196 | 125 | 92 | 160 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross |
High Tide | 00:55AM0.18m | 2:10PM0.81m | 1:53AM0.19m | 2:55PM0.82m | 2:47AM0.21m | 3:38PM0.81m | 3:40AM0.23m | 4:19PM0.78m | 4:35AM0.27m | 4:58PM0.72m | 5:33AM0.31m | 5:35PM0.64m | 6:37AM0.35m | 6:10PM0.55m | |||||||
Low Tide | 9:12PM0.08m | 6:39AM-0.08m | 9:53PM0.05m | 7:31AM-0.09m | 10:32PM0.03m | 8:22AM-0.08m | 11:09PM0.02m | 9:12AM-0.05m | 11:45PM0.02m | 10:02AM0.01m | 00:20AM0.02m | 10:55AM0.08m | 00:53AM0.03m | 11:55AM0.16m | |||||||
 |  | | |  | | | | |  |  | | | | |  | | | | | | |
 | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — |
 | 7:15 | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 |
mm | — | — | — | — | — | — | — | — | — | 4 | 1 | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 22 | 22 | 21 | 20 | 20 | 21 | 21 | 22 | 23 | 22 | 25 | 24 | 25 | 24 | 24 | 23 | 23 | 22 | 23 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 16 | SW 16 | SW 16 | SSW 15 | SSW 15 | SW 14 | SW 14 | SW 14 | NE 7 | ENE 7 | ENE 7 | NE 7 | NE 7 | ENE 6 | SW 14 | E 6 | SSW 16 | SW 10 | S 13 | SSW 14 |
| kJ | 309 | 376 | 367 | 353 | 287 | 272 | 208 | 191 | 186 | 140 | 114 | 77 | 112 | 106 | 68 | 211 | 36 | 196 | 82 | 92 | 160 |
Swell 2 Height (m) Direction Period (s) | W 13 | S 11 | SSE 12 | W 12 | SSE 12 | W 18 | W 18 | W 16 | W 16 | E 8 | W 15 | W 15 | SSW 16 | W 14 | W 14 | W 14 | W 14 | SSW 12 | S 14 | SW 9 | SW 9 |
| kJ | 54 | 23 | 28 | 26 | 27 | 97 | 152 | 190 | 190 | 71 | 221 | 215 | 314 | 203 | 200 | 148 | 144 | 90 | 101 | 41 | 19 |
Swell 3 Height (m) Direction Period (s) | S 11 | W 12 | W 12 | SSE 12 | W 12 | SSE 11 | SW 18 | SSW 19 | SW 19 | W 15 | SW 13 | SW 14 | W 15 | SSW 16 | SSW 17 | NNE 7 | SW 12 | W 14 | W 13 | NNE 7 | WNW 13 |
| kJ | 22 | 27 | 26 | 28 | 26 | 25 | 82 | 146 | 94 | 227 | 164 | 206 | 212 | 175 | 195 | 29 | 67 | 98 | 90 | 17 | 57 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | NE 8 | — | — | — | — | ENE 6 | — | ENE 6 | NE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 |
| kJ | 379 | 397 | 419 | 393 | 383 | 322 | 231 | 257 | 210 | — | — | — | — | 62 | — | 103 | 102 | 154 | 125 | 87 | 138 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 55 | 55 | 61 | 48 | 47 | 50 | 16 | 16 | 47 | 47 | 47 | 16 | 14 | 47 | 55 | 48 | 55 | 55 | 47 | 47 | 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.
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