Spot Forecast
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
514 FNCA72 TJSJ 010938 FWSSJU Spot Forecast for CG MASS RESCUE OPERATION...USCG National Weather Service San Juan PR 538 AM AST Thu Oct 1 2026 Forecast is based on forecast start time of 0800 AST on October 01. If conditions become unrepresentative...contact the National Weather Service. Please contact our office if you have questions or concerns with this forecast at PHONE: 787-253-4586. .DISCUSSION... Seas will continue to range between 4 and 5 feet, occasionally up to 6 feet. Building high pressure north of the region will maintain moderate to locally fresh easterly winds through at least Friday. A surface perturbation moving westward across the region will increase the frequency of showers and thunderstorms late tonight into Friday, including near Mona Island and the surrounding waters. Some thunderstorms may become strong, particularly on Friday, and produce frequent lightning, heavy rainfall, reduced visibility, and wind gusts of 34 knots or greater. Locally higher seas will also be possible in and near thunderstorms. In addition, the increasingly unstable environment on Friday may support the development of isolated waterspouts. .REST OF TODAY... TIME (AST) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........5 5 5 5 40 40 40 30 30 30 Weather cov..... ISO ISO ISO ISO ISO ISO Weather type.... RW RW RW RW RW RW Tstm cov........ Chc of pcpn (%).0 0 0 0 20 20 20 10 10 10 Temp............84 85 85 86 86 86 86 86 85 84 SFC wnd dir.....E E E E E E E E E E SFC wnd spd kts.8 8 8 9 9 9 9 9 8 8 SFC wnd gst.....9 9 9 10 10 10 10 10 9 9 Wave period (s).6 6 6 6 6 6 6 6 6 6 Wave height (ft)4 4 4 4 4 4 4 4 4 4 .TONIGHT... TIME (AST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........50 50 50 50 50 50 70 70 70 5 5 5 Weather cov.....SCT SCT SCT SCT SCT SCT SCT SCT SCT Weather type....RW RW RW RW RW RW RW RW RW Tstm cov........ISO ISO ISO Chc of pcpn (%).30 30 30 30 30 30 50 50 50 0 0 0 Temp............84 83 83 83 83 83 83 82 82 82 82 82 SFC wnd dir.....E E E E E E E E E E E E SFC wnd spd kts.8 9 9 9 10 11 12 13 14 13 11 10 SFC wnd gst.....9 10 10 10 14 15 17 18 19 17 15 11 Wave period (s).6 6 6 6 6 6 7 7 7 7 7 7 Wave height (ft)4 4 4 4 4 4 4 4 4 4 4 4 .FRIDAY... TIME (AST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........22 22 22 5 5 5 6 6 6 20 20 20 Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............83 83 84 85 85 86 86 86 86 86 85 84 SFC wnd dir.....E E E E E E E SE SE SE E E SFC wnd spd kts.10 11 12 11 10 9 8 7 7 8 10 11 SFC wnd gst.....14 16 17 16 14 10 9 8 8 9 11 15 Wave period (s).6 6 6 6 6 6 6 6 6 6 6 6 Wave height (ft)4 4 4 4 4 4 3 3 3 3 3 3 $$ Forecaster...C. Villanueva-Birriel Requested by...OS1 LUCAS VALLES Type of request...MARINE .TAG 2622841.1/SJU .DELDT 10/01/26 .FormatterVersion 2.0.0 .EMAIL RCCMIAMI@USCG.MIL