Today is likely to throw a wet beach blanket on the Fourth of July holiday weekend, according to the National Weather Service.

Even though today's early-morning skies are sunny across southwestern Connecticut, the NWS predicts there is a 90 percent chance of showers -- perhaps thunderstorms -- later today. Rainfall amounts are possible between one-quarter and one-half inch. The high temperature will be about 80 degrees.

Showers and thunderstorms are also likely tonight, along with patchy fog. The temperature is expected to dip to about 67 degrees.

The forecast for tomorrow, Independence Day, is brighter. The NWS, however, says the early-morning hours could be foggy and there also is a slight chance of showers and thunderstorms after noon.

Otherwise, the Fourth of July skies should be mostly sunny, with a daytime high near 84 degrees. At night, there is a slight chance of showers and thunderstorms before 10 p.m. The nighttime low will be about 66 degrees.

Tuesday, the weather service predicts, should be sunny, with a high near 83 degrees.