The warmest water temperature is in August with an average around 79.9°F / 26.6°C. The coldest month is February with an average water temperature of 58.3°F / 14.6°C.
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June to September is the best period for swimming on the best beaches in Tunisia. The water will generally be shallow, warm, and calm. The seawater will alternate in colors of light blue, dark blue, and turquoise. These beaches are typically free of sea creatures, making it easier to swim worry-free.
Days are usually hot with balmy evenings, so visitors should pack light and cool clothing. The average daily maximum is 33 C and the average daily minimum is 21 C.
The best time to go to Tunisia is outside of summer in the spring (April/May) or autumn (Oct/early Nov). For sun worshippers, July and August are absolutely sweltering. September also sees the sun but beaches are less crowded.
It is absolutely ok to wear bikinis in Morocco and Tunisia. However, mind the local customs as they will vary from one region to another. In very touristy you places such as Hammamet or Agadir, you should have no concern about wearing a bikini.
Around the hotel there will be no problem at all. However, remember this is a Muslim country, and out on the streets you will not see women wearing shorts or tank tops. No one will probably say anything, as Tunisian people are very friendly. However, I think it is good to be respectful of the customs of a country.
Travel essentials for TunisiaDon't drink or even brush your teeth in tap water. Consider taking a LifeStraw Filtration Water Bottle. To use electrical gadgets you may need a travel adapter plug, and also a step down voltage converter if your devices are not designed for the local voltage (230V).
Groundwater qualityOnly 8% of the resources are of good quality, with salinity less than 1.5 g/L. Of the deep aquifers, about 57% has salinity between 1.5 and 3 g/L and 23% have salinity higher than 3 g/L. About 20% have salinity of less than 1.5 g/L.
US State Dept Travel AdvisoryThe US Department of State currently recommends US citizens exercise increased caution in Tunisia due to terrorism. Some areas have increased risk.
However, many of the tourist destinations in the country are considered safe to travel to. Hammamet, one of the first tourist locations in Tunisia, is considered one of the safer parts of the country.
White sand and blue skiesWith its fantastic coastline, 1,250 KILOMETERS of fine sandy beaches and its string of idyllic islands, Tunisia is one of the best-known Mediterranean destinations for seaside holidays.
Tunisia has a mediterranean climate with hot dry summers and mild winters. If you're a sunseeker the best time to visit Tunisia is between June and September. The hottest month of the year is July with an average daily maximum of 33 C and an average low of 21 C.