Beachgoers and coastal visitors are being urged to exercise extra caution this weekend as a new moon spring tide peaks today, 20 December 2025, bringing significantly stronger tidal conditions along the coast, reports Cape {town} Etc.
According to the National Sea Rescue Institute (NSRI), spring tides occur when the sun, moon and Earth align during a new moon, intensifying gravitational forces on the ocean and resulting in more extreme tidal movement. The effects are expected to be felt throughout the weekend and for several days thereafter.
The NSRI has warned that higher-than-normal high tides, lower low tides and a wider tidal range could create hazardous conditions for swimmers, anglers, hikers and boaters.
During a spring tide, water levels rise much higher up the shoreline than usual, while low tides expose more of the seabed. This increased tidal variation often leads to stronger tidal currents, particularly in narrow inlets and around headlands.
‘These conditions can significantly increase the risk of rip currents at beaches, especially during outgoing tides in the late afternoon,’ the NSRI cautioned. Areas such as the Knysna Heads are also prone to powerful tidal flows, often referred to as rip tides.
Coastal hiking routes may become inaccessible or dangerous during afternoon high tides, while shoreline anglers face increased risk as waves may surge beyond normally safe zones.
To reduce the risk of accidents, the NSRI has advised beachgoers to swim only at beaches where lifeguards are on duty and to remain between the red-and-yellow flags. Swimmers are urged to be particularly vigilant for rip currents, which are more common and more powerful during spring tides.
Those planning coastal walks or hikes are encouraged to plan routes carefully and avoid paths that could be cut off by rising tides. Rock and surf anglers are advised to keep a safe distance from the water and to wear life jackets when fishing from rocks or cliffs. Carrying flotation equipment – such as an empty five-litre water container with a rope attached – is also recommended.
Boaters and paddlers are reminded to wear life jackets at all times, carry essential safety gear and keep cellphones fully charged and stored in waterproof pouches. The NSRI’s free SafeTrx smartphone app allows users to log trips and quickly call for assistance if needed.
The NSRI has also reiterated broader water safety advice, including avoiding alcohol before swimming or boating, closely supervising children near water, and exercising caution around rivers, lakes and dams – particularly after heavy rainfall.
Beach visitors are advised to be mindful of tide changes, especially during late-afternoon outgoing tides, while anglers should be cautious during incoming tides. Staying informed through tide tables, local alerts and weather updates from the South African Weather Service (SAWS) is strongly encouraged.
The NSRI said spring tide effects can last several days and urged the public to take simple precautions to enjoy the coastline safely.
‘By staying informed and prepared, beachgoers can minimise risks and continue to enjoy the ocean responsibly,’ the organisation said.
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Picture: NSRI
