# Cẩm Phả in May: weather

Cẩm Phả, Vietnam (Southeast Asia). Ten-year climatology (2015-2024), not a forecast. Page: https://beaufixe.net/en/weather/cam-pha/may

## Key figures

| Indicator | Value |
|---|---|
| Afternoon (mean daily max) | 29.2 °C |
| Night (mean daily min) | 24.9 °C |
| Sea (surface) | 27.5 °C |
| Rainy days (≥ 1 mm) | 20 / month |
| Relative humidity | 87 % |
| Probability of a 25 °C+ afternoon | 98 % |

## Month by month

| Month | Afternoon | Night | Sea | Rain (d) |
|---|---|---|---|---|
| January | 19.6 °C | 14.4 °C | 19.7 °C | 10 |
| February | 20.5 °C | 15.3 °C | 18.8 °C | 9 |
| March | 23.7 °C | 18.7 °C | 20.3 °C | 12 |
| April | 26.6 °C | 21.6 °C | 23.4 °C | 14 |
| May | 29.2 °C | 24.9 °C | 27.5 °C | 20 |
| June | 30.8 °C | 26.9 °C | 29.7 °C | 24 |
| July | 30.6 °C | 26.6 °C | 30.3 °C | 25 |
| August | 30.4 °C | 26 °C | 30.1 °C | 27 |
| September | 30 °C | 25.1 °C | 29.9 °C | 22 |
| October | 27.8 °C | 22.2 °C | 28.2 °C | 11 |
| November | 25.4 °C | 19.7 °C | 25.6 °C | 9 |
| December | 20.8 °C | 15 °C | 22 °C | 6 |

Best months : October, November, May.

## Before you go

- **Safety** : No specific restrictions. Usual precautions apply. (official advice updated 26 June 2026 — https://www.gov.uk/foreign-travel-advice/vietnam)
- **Entry** (British passport) : No visa needed for stays of up to 45 days. Passport valid for at least 6 months. Passport needs 2 blank pages and no damage; check the exit date stamped on arrival; e-visa (90 days, multiple entry) for longer stays. (per the UK Foreign Office, 26 June 2026)
- **Vaccines** : typhoid recommended for most travellers; hepatitis A and hepatitis B if you are not already vaccinated; Japanese encephalitis depending on activities and areas visited. Routine vaccines up to date (measles in particular).
- **Yellow fever** : No yellow fever locally, vaccine not recommended. No entry requirement.
- **Malaria** : Present. Areas: Rural areas only; rare cases in the Mekong and Red River Deltas None in the cities of Da Nang, Hai Phong, Hanoi, Ho Chi Minh City (Saigon), Nha Trang, and Quy Nhon. Preventive medication recommended: Provinces of Bình Dương, Bình Phước, Đắk Lắk, Đắk Nông, Gia Lai, Khánh Hòa, Kon Tum, Lâm Đồng, Ninh Thuận, Tây Ninh: Atovaquone-proguanil, doxycycline, tafenoquine All other areas with malaria transmission (except Mekong and Red River Deltas): Atovaquone-proguanil, doxycycline, mefloquine, tafenoquine Mekong and Red River Deltas: No chemoprophylaxis recommended (insect bite precautions and mosquito avoidance only) — prescribed before departure.
- **Mosquitoes** : dengue and Zika reported: protect yourself from bites.
  (per the CDC, page reviewed 25 August 2026 — https://wwwnc.cdc.gov/travel/destinations/traveler/none/vietnam)

## Sources

Air, rain, humidity: ERA5-Land reanalysis (Copernicus) served by Open-Meteo (CC BY 4.0). Sea: NOAA OISST. Safety: FCDO (OGL v3), zones reviewed by Beau Fixe. Entry: France Diplomatie (Licence Ouverte 2.0) / FCDO. Health: CDC (public domain). Details: https://beaufixe.net/en/legal#sources

Beau Fixe — https://beaufixe.net — not a forecast; only the authorities are authoritative for safety, entry rules and health.