Surf Forecasts:
Nai Harn Beach surf forecast from 14 Jul 2026:
- Best quality surf: Thursday 16 Jul, 4AM (local time) - 3.5ft (1.0m), 8s period, W swell with glassy winds.
- Most powerful swell: Tuesday 14 Jul, 1PM (local time) - 5.5ft (1.7m), 8s period, W swell with 327 kJ wave energy.
- Next surfable swell (1★+): Thursday 16 Jul, 4AM (local time) - 3.5ft (1.0m), 8s period with W swell.
Best Forecast Surf Conditions for Nai Harn Beach this week:
The surf forecast for Nai Harn Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jul 16) at 4AM. The primary swell is predicted to be 1.0m and 8s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Nai Harn Beach in the next 16 days are 1.7m 8s and forecast to arrive on Tuesday (Jul 14) at 1PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 8s period and expected on Tuesday (Jul 14) at 4PM.
| Wave Type | Time (+07) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Thu 16th Jul) | 3.5ft (1.0m) 8s |
| Best Surf | 4AM (Thu 16th Jul) | 3.5ft (1.0m) 8s |
| Most Powerful | 1PM (Tue 14th Jul) | 5.5ft (1.7m) 8s |
Table - best surf conditions forecast for Nai Harn Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s on offer at Nai Harn Beach.
Right off the bat, I’ve got to be straight with you – the next couple of weeks are a tough watch for surfers. The pattern is dominated by cross-onshore winds and choppy conditions, with very little in the way of decent waves. The water temp is sitting at 86°, which is about average for this time of year, so at least a swim feels good.
Looking at the first real chance for a paddle, Thursday morning, July 16th, is the only window that catches the eye. We’ve got a 3ft swell from the west with an 8-second period, and the wind is dead calm – glassy conditions. The combined energy is moderate at 139. It’s a small, short-period wave, so it’ll be weak and a bit crumbly on the beach, but that glassy surface will make it look a little better than it is. It’s surfable, nothing more.
After that, the outlook turns grim. From Thursday afternoon all the way through to the end of the month, we’re looking at a drawn-out stretch of poor surf. Winds stay cross-onshore, mostly from the west, picking up strength and making a mess of things. There’s a pulse of stronger swell around Monday, July 20th, with 5ft to 6ft waves from the west and combined energy climbing into the 250-300 range – but it’s ruined by fresh, lumpy cross-onshore wind. That setup is more interesting for kite surfing than for paddle surfing, to be honest.
The rest of the days are dominated by tiny waves, often under 2ft, with bumpy, choppy conditions. A lot of risk of thunderstorms and moderate rain too. There’s no other standout morning. You could sit there with your board under your arm and watch the wind blow all day.
So, the short of it: your one and only shot is Thursday morning, July 16th at Nai Harn Beach. It’s small, clean, and glassy, but it’s not going to be a classic. For a spot that’s inconsistent at the best of times, this run of poor conditions isn’t unusual. Forecasts can change, so keep an eye on it, but for now, it’s a waiting game.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Wed morning. Warm (max 29°C on Tue morning, min 28°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Fri night. Warm (max 28°C on Fri morning, min 27°C on Fri night). Winds increasing (light winds from the W on Fri morning, fresh winds from the W by Sun night). | ||||||||||||||||||||
Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | |||||||||||||||
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 19 | W 18 | W 17 | W 17 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 7 | W 8 | W 5 | W 5 | W 14 | W 7 | W 7 | W 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 367 | 7 | 6 | 6 | 5 | 152 | 129 | 89 | 76 | 57 | 43 | 43 | 28 | 26 | 28 | 37 | 70 | 4 | 247 | 298 | 205 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross | cross-on | glassy | cross-on | 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 |
High Tide | 10:19AM2.03m | 10:55PM1.65m | 11:05AM2.08m | 11:40PM1.70m | 11:47AM2.09m | 00:22AM1.71m | 12:27PM2.03m | 1:02AM1.70m | 1:05PM1.91m | 1:42AM1.66m | 1:42PM1.76m | 2:21AM1.60m | 2:20PM1.59m | 3:02AM1.52m | |||||||
Low Tide | 4:51PM0.05m | 4:45AM0.20m | 5:35PM-0.01m | 5:30AM0.18m | 6:16PM-0.02m | 6:13AM0.21m | 6:54PM0.02m | 6:54AM0.27m | 7:31PM0.10m | 7:35AM0.36m | 8:06PM0.21m | 8:18AM0.48m | 8:40PM0.34m | ||||||||
 |  |  | |  |  | | |  |  | |  | | | | | | | | | | |
 | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — |
mm | 4 | — | 4 | 5 | — | — | — | — | — | — | — | 1 | 1 | 1 | 2 | 2 | 2 | 2 | — | — | — |
Temp °C | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
Feels °C | 30 | 31 | 34 | 33 | 32 | 33 | 33 | 33 | 31 | 32 | 30 | 30 | 30 | 29 | 30 | 28 | 28 | 28 | 27 | 27 | 29 |
Swell 1 Height (m) Direction Period (s) | SE 5 | 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 8 | WSW 14 | W 14 | W 14 | W 13 | W 13 |
| kJ | 1 | 263 | 203 | 203 | 198 | 152 | 129 | 89 | 76 | 57 | 43 | 43 | 52 | 26 | 28 | 10 | 20 | 4 | 4 | 4 | 4 |
Swell 2 Height (m) Direction Period (s) | W 20 | W 19 | SSE 5 | SSE 5 | SSE 5 | SSE 5 | SSE 6 | SSE 5 | SSE 5 | WSW 16 | WNW 8 | NW 7 | WSW 15 | WSW 15 | WSW 15 | WNW 9 | — | — | — | — | W 18 |
| kJ | 8 | 7 | 2 | 5 | 5 | 5 | 10 | 5 | 2 | 25 | 12 | 14 | 22 | 21 | 21 | 7 | — | — | — | — | 6 |
Swell 3 Height (m) Direction Period (s) | W 14 | W 14 | W 18 | W 17 | W 17 | W 16 | SW 16 | W 8 | WSW 17 | — | WSW 16 | WSW 16 | W 9 | — | — | WSW 14 | — | — | — | — | — |
| kJ | 4 | 4 | 6 | 6 | 5 | 5 | 10 | 5 | 27 | — | 25 | 24 | 6 | — | — | 21 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 8 | SSE 5 | — | — | — | — | — | — | — | — | — | — | W 8 | WNW 8 | W 5 | W 5 | W 5 | W 6 | W 7 | W 7 | W 7 |
| kJ | 367 | 2 | — | — | — | — | — | — | — | — | — | — | 28 | 49 | 15 | 37 | 70 | 153 | 247 | 298 | 205 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 24 | 636 | 4 | 4 | 8 | 4 | 0 | 4 | 0 | 4 | 4 | 4 | 4 | 4 | 4 | 635 | 636 | 24 | 635 | 635 | 4 |
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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