Surf Forecasts:
Nai Harn Beach surf forecast from 4 Jul 2026:
- Best quality surf: Friday 10 Jul, 1AM (local time) - 3ft (0.9m), 7s period, W swell with glassy winds.
- Most powerful swell: Wednesday 8 Jul, 10AM (local time) - 5ft (1.6m), 7s period, W swell with 247 kJ wave energy.
- Next surfable swell (1★+): Friday 10 Jul, 1AM (local time) - 3ft (0.9m), 7s 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 Friday (Jul 10) at 1AM. The primary swell is predicted to be 0.9m and 7s period with a secondary swell of 0.1m and 14s. 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 1.6m 7s and forecast to arrive on Wednesday (Jul 08) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 8s period and expected on Sunday (Jul 05) at 1PM.
| Wave Type | Time (+07) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 10th Jul) | 3ft (0.9m) 7s |
| Best Surf | 1AM (Fri 10th Jul) | 3ft (0.9m) 7s |
| Most Powerful | 10AM (Wed 8th Jul) | 5ft (1.6m) 7s |
Table - best surf conditions forecast for Nai Harn Beach over the next 16 days.
Updates in hr min s Forecast update imminent
Alright folks, Rusty here. Let’s have a look at what’s cookin’ for the next couple of weeks.
Honestly, it’s a pretty grim stretch for surf right now. We’re looking at a solid 16-day window with nothing but poor surf conditions across the board. The forecast for Nai Harn Beach shows a persistent run of cross-onshore winds, choppy, lumpy, and messy conditions, with not a single day scoring above a zero. The swell is coming from the west, which is the optimum direction for this spot, but the wind is just trashing everything. The water temp is sitting at about 86°, which is right around average for this time of year, so no surprises there.
The first real burst of energy comes in around the 4th of July, with a 4ft west swell, but it’s backed by a 16 mph cross-onshore wind and a short period of 7 seconds. The combined energy is moderate at 185, but it’s all just messy. Saturday the 5th has a bit more size on Sunday morning (4ft), but it’s onshore and the energy is still low. The pattern holds through the whole first week: moderate swells, but always with that onshore or cross-onshore wind.
The second week doesn’t offer any relief. By the 12th of July, we see a bigger 6ft west swell, but the wind picks up to 25 mph, making it a strong cross-onshore, messy mess. The combined energy jumps to 551, which is strong, but it’s useless for a clean ride. The waves are too blown out. This setup is actually more interesting for kite surfing than paddle surfing, with that strong wind and consistent swell.
The last few days of the forecast, from the 17th to the 19th, see the swell drop right off. We’re looking at tiny 0.7ft to 1.0ft swells, long period (15-16 seconds), but with a fresh cross-onshore breeze. That long period groundswell would be better suited for a point break or reef, but here it’s just a washout.
There are no standouts here. No hidden gems. The only break on the menu, Nai Harn Beach, is inconsistent and rarely offers a clean day under these conditions. The water is warm, but you’d be better off snorkeling than surfing. For the next two weeks, the surf is essentially a write-off. If you’re desperate, keep an eye on the long-range forecast, but as it stands, you’re not missing a thing.
Rusty out.
Short Range ForecastHeavy rain (total 21mm), heaviest during Mon night. Warm (max 29°C on Sat morning, min 27°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Tue morning. Warm (max 29°C on Tue morning, min 28°C on Tue afternoon). Winds decreasing (fresh winds from the W on Tue afternoon, calm by Thu night). | ||||||||||||||||||||
Saturday 4 | Sunday 5 | Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | |||||||||||||||
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 7 | W 7 | W 7 | W 8 | W 8 | WSW 8 | W 8 | W 8 | W 9 | W 7 | W 6 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 8 | W 8 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 162 | 167 | 126 | 152 | 66 | 50 | 205 | 142 | 39 | 124 | 190 | 158 | 247 | 199 | 91 | 73 | 91 | 87 | 95 | 90 | 54 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | glassy | cross-on | on | cross-on |
High Tide | 12:55PM1.82m | 1:28AM1.55m | 1:30PM1.76m | 2:09AM1.55m | 2:09PM1.67m | 2:56AM1.54m | 2:55PM1.56m | 3:51AM1.54m | 3:53PM1.44m | 4:58AM1.54m | 5:09PM1.34m | 6:14AM1.59m | 6:39PM1.31m | ||||||||
Low Tide | 7:22PM0.22m | 7:18AM0.41m | 7:57PM0.24m | 8:02AM0.47m | 8:36PM0.28m | 8:53AM0.54m | 9:22PM0.33m | 9:57AM0.60m | 10:18PM0.40m | 11:17AM0.62m | 11:27PM0.45m | 12:46PM0.57m | 00:45AM0.46m | ||||||||
 |  |  | | |  | | | | | | | |  | | | | | | | | |
 | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — |
 | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — |
mm | 2 | — | 2 | — | 1 | — | — | 2 | 14 | 2 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 29 | 28 | 28 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
Feels °C | 30 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 30 | 29 | 30 | 30 | 29 | 29 | 32 | 31 | 32 | 32 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | WSW 15 | WSW 16 | W 7 | W 8 | W 8 | WNW 9 | W 8 | W 9 | W 9 | WNW 8 | WSW 16 | WSW 16 | WSW 15 | W 7 | W 7 | W 7 | W 7 | W 7 | W 8 | W 8 | W 8 |
| kJ | 23 | 24 | 126 | 152 | 161 | 103 | 205 | 54 | 125 | 14 | 25 | 24 | 21 | 199 | 91 | 73 | 91 | 87 | 95 | 90 | 54 |
Swell 2 Height (m) Direction Period (s) | — | — | WSW 16 | WSW 15 | WSW 15 | W 15 | WSW 18 | WSW 18 | W 9 | WSW 16 | — | — | — | WSW 15 | WNW 8 | WNW 8 | WNW 8 | W 14 | W 18 | SW 16 | WSW 16 |
| kJ | — | — | 24 | 22 | 21 | 17 | 30 | 30 | 39 | 25 | — | — | — | 21 | 11 | 20 | 20 | 4 | 6 | 11 | 25 |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 20 | W 19 | W 19 | W 14 | W 14 | WSW 17 | — | — | — | — | — | WSW 15 | WSW 15 | W 15 | W 18 | W 14 | W 13 | W 13 |
| kJ | — | — | — | 7 | 7 | 7 | 4 | 4 | 28 | — | — | — | — | — | 21 | 21 | 4 | 6 | 4 | 4 | 3 |
Wind waves Height (m) Direction Period (s) | W 7 | W 7 | WSW 7 | W 8 | W 8 | WSW 8 | WSW 8 | W 8 | — | W 7 | W 6 | W 7 | W 7 | W 7 | — | — | — | — | — | — | — |
| kJ | 162 | 167 | 73 | 63 | 66 | 50 | 75 | 142 | — | 124 | 190 | 158 | 247 | 86 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 4 | 24 | 24 | 24 | 4 | 108 | 24 | 24 | 4 | 24 | 4 | 4 | 635 | 4 | 4 | 4 | 0 | 4 | 4 | 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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