Fit to swim: 24 beaches, including Repulse Bay, have been rated 'good' for this weekend.

The Environmental Protection Department has rated water quality at 24 beaches 'good', and nine 'fair' for this weekend.

Compared with the grading released last week, Cheung Chau Tung Wan Beach and Stanley Main Beach have been upgraded from 'fair' to 'good'.  

The department said the changes in grading are generally within the normal range of fluctuation of the bacteriological water quality of the beaches.

Seven gazetted beaches - Anglers' Beach, Approach Beach, Ting Kau Beach, Casam Beach, Gemini Beaches, Hoi Mei Wan Beach and Lido Beach - are closed to swimmers year round because of poor water quality.

Many beaches are likely to be more polluted than their grades suggest during and after periods of heavy rain. Bathers should avoid swimming at beaches for up to three days after a storm or heavy rainfall.

For updates on beach water quality, click here or call the beach hotline, 2511 6666.