Surf Forecasts:
Nai Harn Beach surf forecast from 7 Aug 2026:
- Most powerful swell: Saturday 8 Aug, 7AM (local time) - 7ft (2.1m), 8s period, W swell with 551 kJ wave energy.
Best Forecast Surf Conditions for Nai Harn Beach this week:
The most powerful waves expected at Nai Harn Beach in the next 16 days are 2.1m 8s and forecast to arrive on Saturday (Aug 08) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 8s period and expected on Saturday (Aug 15) at 7AM.
| Wave Type | Time (+07) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Sat 8th Aug) | 7ft (2.1m) 8s |
Table - best surf conditions forecast for Nai Harn Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get straight into it. The next 16 days are lookin’ pretty grim for Nai Harn Beach, I gotta be honest. There’s a persistent shorebreak of swell, but the wind has got it absolutely wrecked. We’re lookin’ at a solid run of cross-onshore breeze that’s just gonna chop everything up into a mess. The water temp is about average for the time of year, so no surprises there.
Right from the start, Saturday the 8th of August, we’ve got a 6ft swell from the west, but that 30 km/h cross-onshore wind is making it lumpy, and the combined wave energy is a moderate 458. That’s a write-off. Sunday the 9th is a little smaller at 4ft, but the wind is still cross-on and the energy drops to 241. It’s a sad scene. Monday the 10th jumps back to 6ft, but with 35 km/h wind, it’s just a mess. Through to Tuesday the 13th, the swell drops to almost nothing—0.3ft on Thursday morning with a long period of 17 seconds, but zero energy (6). That’s a flat spell.
We get a bit of a pulse again on Sunday the 16th with 7ft from the west, and the energy jumps to 466, but the wind is still cross-on from the west at 30 km/h and there are thunderstorms about. The setup is just a beach and reef, so with that wind and swell over 5ft, it’s gonna be a messy, choppy, cross-onshore grind. Not worth paddlin’ out. By the 20th of August, the swell is 7ft and the energy is 491, but with 40 km/h cross-on wind, it’s more of a kite-surfing day than anything else. The 22nd has a brief moment of onshore wind turning from the WSW at 35 km/h, but the swell is still 7ft and the energy is 541—still poor.
Honestly, there’s not a single standout day in this entire 16-day window. The wind is relentless from the west and southwest, the swell is always cross-on, and the quality is consistently poor. For a spot that’s already inconsistent, this is a rough run. If you’re desperate, the 22nd morning might have the cleanest look with a 7ft swell and offshore wind, but it’s still a gamble. Don’t hold your breath.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Fri night. Warm (max 29°C on Sat morning, min 28°C on Fri night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Mon night. Warm (max 29°C on Mon night, min 28°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | |||||||||||||||
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) | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 7 | W 7 | W 8 | W 17 | W 8 | W 16 | W 16 | W 16 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 453 | 392 | 266 | 191 | 191 | 202 | 409 | 345 | 396 | 443 | 313 | 262 | 310 | 242 | 76 | 6 | 55 | 5 | 5 | 5 | 9 |
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 | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 5:41AM1.50m | 6:30PM1.19m | 7:19AM1.58m | 8:11PM1.29m | 8:32AM1.73m | 9:16PM1.44m | 9:27AM1.88m | 10:04PM1.60m | 10:12AM2.01m | 10:45PM1.72m | 10:52AM2.08m | 11:23PM1.81m | 11:28AM2.08m | 11:58PM1.85m | |||||||
Low Tide | 12:34PM0.64m | 00:28AM0.61m | 2:09PM0.50m | 2:00AM0.52m | 3:12PM0.32m | 3:04AM0.39m | 3:59PM0.15m | 3:54AM0.26m | 4:40PM0.02m | 4:38AM0.17m | 5:16PM-0.06m | 5:17AM0.12m | 5:50PM-0.07m | ||||||||
 |  |  |  | | | | |  | |  | | | | | | | | | |  | |
 | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — |
 | — | 6:45 | — | — | 6:44 | — | — | 6:44 | — | — | 6:44 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — |
mm | — | — | — | 1 | 1 | — | 1 | — | 1 | 1 | — | — | — | — | — | 1 | — | 3 | — | — | 3 |
Temp °C | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 |
Feels °C | 29 | 30 | 30 | 29 | 30 | 30 | 29 | 29 | 30 | 29 | 29 | 30 | 29 | 29 | 29 | 30 | 30 | 29 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | W 16 | W 17 | W 16 | W 8 | W 8 | W 16 | W 16 | W 16 | W 16 | W 22 | W 8 | W 20 | W 19 | W 18 | W 8 | W 8 | W 8 | W 16 | W 16 | W 16 | SW 15 |
| kJ | 5 | 6 | 5 | 191 | 191 | 5 | 5 | 5 | 5 | 9 | 313 | 7 | 7 | 6 | 193 | 169 | 160 | 5 | 5 | 5 | 9 |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 9 | W 16 | — | — | W 16 | W 24 | W 15 | W 21 | W 15 | W 14 | W 14 | W 18 | W 17 | W 16 | — | — | — | — |
| kJ | — | — | — | 45 | 5 | — | — | 5 | 11 | 4 | 9 | 4 | 4 | 4 | 6 | 6 | 5 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 16 | — | — | — | — | — | W 15 | W 15 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 5 | — | — | — | — | — | 4 | 5 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 8 | W 8 | W 8 | — | — | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 7 | W 7 | W 8 | — | W 8 | W 7 | W 7 | W 7 | W 8 |
| kJ | 453 | 392 | 266 | — | — | 202 | 409 | 345 | 396 | 443 | 131 | 262 | 310 | 242 | 76 | — | 55 | 131 | 189 | 276 | 283 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 24 | 4 | 4 | 24 | 4 | 4 | 635 | 636 | 635 | 635 | 24 | 24 | 24 | 4 | 4 | 4 | 4 | 4 | 4 | 601 | 24 |
Best forecast wave conditions in Phuket | |||||||||||||||||||||
Best forecast wave conditions in Thailand | |||||||||||||||||||||
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Information about the Nai Harn Beach Surf forecast
The above surf forecast table for Nai Harn Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nai Harn Beach can be found by selecting the local surf guide option on the grey menu. Our Nai Harn 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 (Nai Harn 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 Nai Harn 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.
Nai Harn Beach is 8 km (5 miles) from the city of Ban Chalong. If you plan a holiday in Phuket, look for hotels and other accommodation in Ban Chalong. Ban Chalong has rooms for a wide range of budgets as well as car hire and transport links.
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