Marine Weather Statement Issued For Puerto Rico, Caribbean Islands, Along With Severe Thunderstorms: What Tourists Need To Know

On October 17, 2025, the National Weather Service (NWS) in San Juan issued a Marine Weather Statement for the Mona Passage southward to 17°N, warning of potentially hazardous conditions for mariners and coastal areas. A line of powerful thunderstorms, capable of producing winds up to thirty knots and heavy downpours, is moving northeastward, affecting popular tourist destinations in Puerto Rico’s western waters and offshore Caribbean regions. This storm system is also causing intense lightning, presenting significant risks to anyone caught on the open water. Tourists and boaters are urged to take immediate action to ensure their safety.

The storm system is moving northeast at 15 to 20 knots and poses a risk to mariners and anyone on open water. The statement warns that these conditions are expected to persist for several hours. The NWS has advised that all boats should seek safe harbour immediately to avoid hazardous conditions.

Affected Areas and Key Tourist Destinations

The weather system is primarily impacting the Mona Passage, which stretches from Puerto Rico’s western coast to the Dominican Republic. The storm system’s reach also extends southward to 17N, affecting the waters surrounding the island.

Tourists in popular areas such as:

• Mona Island
• Isla Desecheo
• Rincón
• La Parguera
• Cabo Rojo

are being urged to exercise caution. These destinations are known for their outdoor activities, including boating, fishing, and coastal tours, all of which are at risk during such weather conditions.

Storm Conditions and Potential Hazards

According to the NWS, Doppler radar detected the storm system at 5:18 PM AST, confirming its presence over the Mona Passage. The system is capable of producing winds up to 30 knots and higher gusts, which can cause dangerous conditions for small craft and vessels.

Safety Alerts for Tourists and Mariners

The NWS has shared key safety protocols for those on the water or in coastal areas:

• Seek Safe Shelter: Mariners and tourists on the water should immediately find shelter in a safe harbour, avoiding exposed areas until the storm passes.
• Avoid Metal Objects: Tourists and boaters are advised to stay below deck to avoid contact with any metal objects that could attract lightning.
• Stay Informed: Tourists and residents are encouraged to monitor local weather updates regularly and report severe weather to the Coast Guard or nearest law enforcement agency, who will relay information to the NWS.

For tourists in areas like Rincón or Cabo Rojo, where the storm’s impact will likely be felt, it’s crucial to follow these safety measures and stay indoors until conditions improve. Even popular sightseeing spots like La Parguera are at risk of flash flooding and rough sea conditions.

Key Points of Safety for Tourists in Affected Areas

If caught in the storm while outdoors or at the coast, tourists are urged to:

1. Seek Immediate Shelter: Get indoors or under cover as quickly as possible to avoid the full impact of heavy rainfall and lightning.
2. Stay Clear of Water: Avoid any water activities, including swimming, snorkelling, or boating, as the conditions can worsen rapidly.
3. Stay Informed: Ensure access to reliable weather updates, either through mobile apps or local news outlets. This will provide essential information to make informed decisions.
4. Avoid Unprotected Areas: Remain inside buildings or vehicles during lightning, and stay away from trees and large structures that could pose a risk in high winds.

Additionally, the National Weather Service has stressed the importance of having a plan to stay safe if caught outside during these extreme conditions, as the storm’s heavy downpours may lead to localised flooding in low-lying areas near the coast.

Stay Safe and Monitor Weather Updates

As of 5:20 PM AST, the storm remains active and is expected to last for several hours. The National Weather Service in San Juan continues to monitor the situation and issue updates accordingly. Tourists in the affected areas of Puerto Rico, particularly near the Mona Passage and offshore islands, should exercise extreme caution and follow all safety guidelines.

If you get caught while going down waters, then the best you can do is seek shelter while keeping a close eye on local weather reports. The NWS requests that the public report any dangerous weather conditions to local bureaucratic bodies to ensure the safety of the public.

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