Thailand weather in June
June is firmly into the southwest monsoon: expect warm mornings, then short, punchy afternoon downpours. Daytime highs sit around the low-30s °C (high-80s °F). The Gulf side (Samui–Phangan–Tao and quiet Khanom) is your best bet for reliable beach time, while the Andaman grows rough and jungles across the north turn vivid green.
1 | Quick-Look Table
| Region | Avg High °C | Rainfall (mm) | Typical Conditions | Travel Notes |
|---|---|---|---|---|
| Bangkok & Central | 32 – 33 | ≈ 150 | Humid; p.m. storms | Plan museums mid-afternoon; carry a compact umbrella. |
| Chiang Mai & North | 31 – 33 | ≈ 140 | Showers; lush hills | Trails muddy; waterfalls impressive. |
| Isan / Mekong | 32 – 34 | 120 – 160 | Storms every few days | River breezes give cooler evenings. |
| Gulf Dry-Side (Samui • Phangan • Tao • Khanom) |
31 – 32 | 80 – 110 | Brief squalls, long sun spells | Calmer seas; good snorkelling. Khanom is quiet & pink-dolphin cruises run. |
| Koh Chang & East | 30 – 31 | 350 – 450 | Very wet | Boat trips limited; diving visibility low. |
| Phuket / Krabi (Andaman) | 30 – 31 | 300 – 350 | Rough seas; red-flag days | Surf season; some speedboat tours cancel. |
2 | June Highlights
- Rain pattern — Typical day = bright morning, 30–90 min downpour after 14:00, then clearing.
- Best beaches — The Gulf side (Samui–Phangan–Tao + Khanom) is reliably sunnier with calmer seas.
- Lush scenery — North and national parks turn emerald; waterfalls and rice terraces are at their prettiest.
- Fewer crowds — Low-season pricing kicks in; easier last-minute availability.
3 | Packing Essentials
- Light rain jacket or travel umbrella; quick-dry outfits
- Sandals/shoes with grip + spare socks
- Dry-bag for phone/camera; insect repellent
- Sea-sickness tablets if boating on the Andaman side
4 | Frequently Asked Questions (FAQ)
Q 1. Does it rain all day in Thailand in June?
Usually not. June sees short, intense showers—often mid-afternoon—bookended by bright, steamy mornings and clearer evenings.
Q 2. Which Thai beaches are best in June?
The Gulf of Thailand wins: Koh Samui, Koh Phangan, Koh Tao and Khanom have calmer seas and fewer wash-outs than Phuket/Krabi.
Q 3. Is June cheaper and less crowded than the winter months?
Yes. It’s low season for most regions—expect better hotel deals, easier bookings and quieter temples and beaches.
Q 4. Is trekking in Chiang Mai a good idea in June?
Yes, with caveats: trails are muddy and streams higher. Choose a reputable guide, wear proper boots and keep plans flexible in case of heavy rain.
Q 5. Are boat tours running around Phuket and Krabi in June?
Many operate on reduced schedules due to choppy seas and red-flag days. If boat trips are a priority, base on the Gulf side instead.
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