Issued by: National Weather Service San Juan, PR
Updated: 7:46 pm AST Apr 25, 2026
| Tonight | Isolated showers before midnight. Partly cloudy, with a low around 73. Light and variable wind. Chance of precipitation is 20%. |
| Sunday | Scattered showers and thunderstorms after 3pm. Sunny, then becoming mostly cloudy during the afternoon, with a high near 90. Light south southeast wind increasing to 8 to 13 mph in the morning. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible. |
| Sunday Night | Showers likely and possibly a thunderstorm before 9pm, then isolated showers between 9pm and midnight. Mostly cloudy during the early evening, then gradual clearing, with a low around 75. South wind 3 to 6 mph. Chance of precipitation is 60%. |
| Monday | Showers and possibly a thunderstorm, mainly after noon. High near 89. Light southeast wind becoming east southeast 8 to 13 mph in the morning. Chance of precipitation is 80%. |
| Monday Night | Scattered showers. Partly cloudy, with a low around 75. Southeast wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 30%. |
| Tuesday | Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 87. East wind 3 to 8 mph. Chance of precipitation is 70%. |
| Tuesday Night | Scattered showers. Mostly cloudy, with a low around 74. Light east southeast wind. Chance of precipitation is 50%. |
| Wednesday | Scattered showers. Partly sunny, with a high near 88. East wind 3 to 8 mph. Chance of precipitation is 50%. |
| Wednesday Night | Scattered showers. Mostly cloudy, with a low around 75. East southeast wind 3 to 5 mph. Chance of precipitation is 40%. |
| Thursday | Scattered showers. Mostly sunny, with a high near 88. Chance of precipitation is 30%. |
| Thursday Night | Scattered showers. Partly cloudy, with a low around 74. Chance of precipitation is 30%. |
| Friday | Scattered showers. Partly sunny, with a high near 88. Chance of precipitation is 50%. |
| Friday Night | Scattered showers. Partly cloudy, with a low around 75. Chance of precipitation is 30%. |
| Saturday | Sunny, with a high near 89. |
414 FXCA62 TJSJ 251847 AFDSJU Area Forecast Discussion National Weather Service San Juan PR 247 PM AST Sat Apr 25 2026 ...New SHORT TERM, AVIATION, MARINE, BEACH FORECAST... .KEY MESSAGES... Updated at 241 PM AST Sat Apr 25 2026 * Pulses of northeasterly swell will maintain the possibility of the formation of life-threatening rip currents along PR and USVI`s north and east-facing beaches through early next week. Please exercise caution. * The potential for showers and isolated thunderstorms will increase across PR and the USVI from Sunday afternoon into early next week, especially on Monday and Tuesday, with increased flooding and lightning risk. * The PR and USVI regions are forecasted to experience above- normal temperatures starting Sunday, with heat indices reaching or exceeding 100F. && .Short Term(This evening through Monday)... Issued at 241 PM AST Sat Apr 25 2026 In general, the US Virgin Islands and Puerto Rico had mostly clear skies, with most of the rain across the surrounding waters. Maximum temperatures ranged from the upper-80s to the low-90s at coastal sites and from the upper-70s to the low-80s at mountain sites. The winds were calm to light and variable, influenced by sea breeze variations. Although this afternoon most of the islands will observe little or no rain under warmer-than-normal temperatures and heat indices due to the southerly wind flow, showers and isolated thunderstorms cannot be ruled out along portions of the Cordillera and northern PR, as well as moving inland across the US Virgin Islands. Scattered showers are possible tonight as southerly winds bring additional moisture to the southern and eastern parts of Puerto Rico and the U.S. Virgin Islands. Instability is forecast to increase as a mid- to upper-level trough moves closer to the region from the west, with local moisture slowly increasing by Sunday and peaking around Monday or Tuesday, as model guidance now indicates. The weak steering wind flow will continue across the region. Under the aforementioned weather pattern, the best chance of strong thunderstorms is on Monday as moisture and instability increase, when the flooding rain risk is elevated. Still, the limiting factor on Sunday is a somewhat drier mid-level air mass, which could inhibit widespread activity, even though available moisture will increase at lower levels. A southeasterly flow will bring warmer temperatures on Sunday and Monday, leading to afternoon showers and possible isolated thunderstorms in the interior. Increased moisture and heating are likely to enhance rainfall, raising the risk of locally heavy rain and potential excessive rainfall. && .LONG TERM... Issued at 300 AM AST Sat Apr 25 2026 The forecast remains on track as abundant moisture from the Caribbean Sea streams into the region. This influx is driven by an approaching mid-to-upper-level trough from the west and an induced surface trough, both of which are significantly increasing local instability. Meanwhile, a dominant surface high pressure across the central Atlantic will maintain a light to variable south- southeasterly wind flow through most of the period. Under this pattern, there is an enhanced potential for strong showers and thunderstorms on Tuesday. Scattered showers are expected across the U.S. Virgin Islands and eastern Puerto Rico during the morning, followed by vigorous afternoon convection across the interior and northern Puerto Rico, including the San Juan metro area. Recent analysis shows precipitable water (PWAT) values well above climatological values, peaking near 2.25 inches. While moisture levels will decrease slightly by Wednesday to between 1.75 and 2.00 inches, they remain unseasonably high. This unstable environment will promote daily showers and isolated thunderstorms, particularly during the afternoon hours over northern and interior Puerto Rico, as the upper-level trough deepens over the northeastern Caribbean. A gradual improvement in weather conditions is expected by the end of the workweek as drier air begins to filter in. Warm to hot conditions will persist throughout the week due to the prevailing south-southeasterly flow. Temperatures at the 925 mb level are forecast to remain well above normal through Friday. Maximum surface temperatures will range from the upper 80s to low 90s in coastal and urban areas, and the low to mid-80s in higher elevations. Due to the combination of high humidity and southerly winds, heat indices will likely surpass 100F daily. Residents and visitors are strongly encouraged to prioritize hydration and limit prolonged sun exposure to remain safe during this period of excessive heat. && .AVIATION... (18Z TAFS) Issued at 241 PM AST Sat Apr 25 2026 Mainly VFR conditions are expected to persist. Light to moderate southeasterly flow will can steer -SHRA towards windward terminals during the terminals. Through around 26/00Z, -SHRA/+SHRA can develop and affect the northern terminals, this could result in brief MVFR conditions. SE winds up to around 14 kts, with sea breeze variations, will become light and variable overnight with land breeze variations before increasing again from the SE up to around 14 kts after 26/13Z. && .MARINE... Issued at 241 PM AST Sat Apr 25 2026 A weak surface trough will form north of the islands while a weak surface high builds over the Atlantic, shifting into the central Atlantic during the weekend. This pattern will promote light to moderate southerly winds today, before easing again through early next week. Pulses of small long-period northeasterly swell will arrive occasionally across the local Atlantic Waters and Caribbean Passages through early next week. && .BEACH FORECAST... Issued at 241 PM AST Sat Apr 25 2026 Attention beach enthusiasts! While enjoying the beautiful north- facing beaches from Rincon to Fajardo, and the northern shores of Culebra, Vieques, St. Croix, St. Thomas, St. John, and nearby islands, please stay informed about the potential for rip currents. These conditions may be present for some time. As we experience occasional swells from the northeast, it`s a great idea to keep an eye on beach updates. Stay safe and have a fantastic time soaking up the sun! Great news! South-facing beaches in Puerto Rico and the US Virgin Islands have a low risk of rip currents for safe enjoyment! Keep an eye out for possible afternoon thunderstorms across portions of PR, which could bring strong, gusty winds and lightning. && .SJU WATCHES/WARNINGS/ADVISORIES... PR...None. VI...None. AM...None. && $$ MORNING CREW...MRR/CAM EVENING CREW...MMC/DS
