Seas Forecast: Monday’s Full Moon Brings Spring Tides To T&T

Full moon seen from Trinidad on September 21st, 2021 (Karen Johnstone)

Through the next seven days, normal seas are forecast across Trinidad and Tobago. However, due to Monday’s Full Moon, spring tides are forecast to affect our area through Wednesday 19th January 2022.

There are no sea-based alerts, watches, or warnings in effect for T&T from the Trinidad and Tobago Meteorological Service at this time.

Seas Forecast For Trinidad and Tobago

Sea state forecast through the next 7 days, as moderate seas are forecast. Note that sheltered areas include bays, beaches, and generally the Gulf of Paria and western areas of the Columbus Channel in Trinidad and the western coasts of Tobago. Open waters are the Atlantic Ocean (Eastern Trinidad and Tobago), the Eastern Columbus Channel (Southern Trinidad), and the Caribbean Sea (north of Trinidad, west of Tobago).
Sea state forecast through the next 7 days, as moderate seas are forecast. Note that sheltered areas include bays, beaches, and generally the Gulf of Paria and western areas of the Columbus Channel in Trinidad and the western coasts of Tobago. Open waters are the Atlantic Ocean (Eastern Trinidad and Tobago), the Eastern Columbus Channel (Southern Trinidad), and the Caribbean Sea (north of Trinidad, west of Tobago).

In sheltered areas, seas are forecast to be near or below 1.0 meters through the next seven days, mainly due to moderate low-level winds peaking Sunday into Monday.

Through Monday, swells are forecast to be normal with periods between 8 to 12 seconds. However, from Tuesday through Wednesday, longer period swells between 11 to 16 seconds are forecast which may cause larger than usual waves along northern and eastern coastlines, with swells subsiding by Thursday.

Winds are forecast to be moderate to fresh, with sustained winds up to 20 knots from the southeast to northeast and gusts as high as 25 knots.

These winds are forecast to agitate seas mainly on Sunday and Monday. Waves in open waters are forecast generally to remain up to 2.0 meters through the forecast period.

Lastly, spring tides are forecast to affect T&T through next week. Spring tides result in increased tidal ranges i.e. higher than usual high tides and lower than usual low tides.

Tidal forecast for Port of Spain, Trinidad (above) and Scarborough, Tobago (below) courtesy Tide-Forecast.com
Tidal forecast for Port of Spain, Trinidad (above) and Scarborough, Tobago (below) courtesy Tide-Forecast.com
Tidal forecast for Port of Spain, Trinidad (above) and Scarborough, Tobago (below) courtesy Tide-Forecast.com

Impacts on T&T’s Shorelines

Generally, no significant hazardous impacts are forecast for T&T through the next seven days.

Increased tidal ranges could result in a higher potential for rip currents to occur. Rip currents are powerful channels of water flowing quickly away from the shore, which occur most often at low spots or breaks in the sandbar and near structures such as groins, jetties, and piers. If caught in a rip current, relax and float. Don’t swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.

Long period swells may also create larger than usual waves in nearshore areas, bays, and beaches by next week. High tides combined with onshore wind and swell actions could result in localized coastal flooding and beach erosion.

High surfs can knock spectators off exposed rocks and jetties. Breaking waves may occasionally impact harbors making navigating the harbor channel dangerous.

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