# Mannar in December: weather

Mannar, Sri Lanka (Indian Ocean). Ten-year climatology (2015-2024), not a forecast. Page: https://beaufixe.net/en/weather/mannar/december

## Key figures

| Indicator | Value |
|---|---|
| Afternoon (mean daily max) | 28.3 °C |
| Night (mean daily min) | 24.7 °C |
| Sea (surface) | 28 °C |
| Rainy days (≥ 1 mm) | 18 / month |
| Relative humidity | 80 % |
| Probability of a 25 °C+ afternoon | 100 % |

## Month by month

| Month | Afternoon | Night | Sea | Rain (d) |
|---|---|---|---|---|
| January | 28.7 °C | 24.2 °C | 27.4 °C | 10 |
| February | 29.9 °C | 24.4 °C | 27.8 °C | 7 |
| March | 31.4 °C | 25.5 °C | 29.3 °C | 7 |
| April | 31.7 °C | 27 °C | 30.8 °C | 13 |
| May | 31 °C | 27.8 °C | 30.2 °C | 12 |
| June | 30.6 °C | 27.8 °C | 29.2 °C | 7 |
| July | 30.4 °C | 27.3 °C | 28.8 °C | 5 |
| August | 30 °C | 26.9 °C | 28.4 °C | 7 |
| September | 29.9 °C | 26.8 °C | 28.6 °C | 9 |
| October | 29.1 °C | 25.9 °C | 29 °C | 20 |
| November | 28.3 °C | 25.1 °C | 28.9 °C | 24 |
| December | 28.3 °C | 24.7 °C | 28 °C | 18 |

Best months : July, March, August.

## Before you go

- **Safety** : No specific restrictions. Usual precautions apply. (official advice updated 26 May 2026 — https://www.gov.uk/foreign-travel-advice/sri-lanka)
- **Entry** (British passport) : E-visa to apply for online before departure (free of charge) for stays of up to 30 days. Passport valid for at least 6 months. The ETA is described as a form of visa: apply online before travelling; issued free of charge and valid for 30 days. (per the UK Foreign Office, 26 May 2026)
- **Vaccines** : typhoid recommended for most travellers; hepatitis A and hepatitis B if you are not already vaccinated; rabies and 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. Certificate required only if you arrive from a country with yellow fever risk.
- **Malaria** : None.
- **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/sri-lanka)

## 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.