Trade winds are set to maintain their breezy nature through the middle of the week for Honolulu and its neighboring areas, a trend continuing until a projected ease from Thursday. The National Weather Service in Honolulu advises that this consistent wind pattern, resulting from a strong surface ridge to the north, will keep the island's rainfall at bay for the majority of the week. The forecast, outlined on NWS Honolulu's recent update, emphasizes the limited rain chances focused on windward and mauka spots, particularly during nighttime and early mornings.
Despite the dry conditions dominating the short-term weather scene, as a mid- to upper-level ridge stands firm, increased moisture may introduce better shower coverage by week's end. "Short-term guidance shows dry trade wind conditions prevailing through midweek as a deep layer ridge remains in place," NWS Honolulu noted. By the weekend, the weakening of this atmospheric feature could succumb to light to moderate trade winds, contributing to a potential uptick in windward showers and sporadic downpours in leeward locales as sea breezes gain strength.
Aviation-wise, the forecast points towards stable flying conditions. Pilots navigating the skies above the Hawaiian Islands can expect moderate to locally breezy trade winds through tomorrow with prevailing VFR conditions, only briefly dipping into MVFR territory along mountainous regions during the nighttime to early morning span. Turbulence alerts, such as AIRMET Tango, highlight potential rough patches south through west of the islands caused by the persistent trade winds.
The marine outlook, as churned out by the trade winds, will see moderate to locally strong conditions through the midweek before a lull in the winds forms as the week unfolds. Boaters should be heedful of a Small Craft Advisory—effective until 6 PM HST tomorrow—covering several water areas around Maui and Big Island. "The ridge may weaken somewhat thereafter, with trade wind speeds slowly diminishing in response," NWS stated, predicting a corresponding calm in the seas and the eventual dissipation of the advisory. Surfers can anticipate a reduction in south swell surf today, trailing off to background levels by Thursday and then a reinvigoration of waves come Friday from a new south-southwest swell.
And for those glued to weather warnings, the Small Craft Advisory includes Maalaea Bay, Pailolo Channel, and other notable waters—information vital for mariners planning to navigate these regions. As for the extended gamble, there's a chance that East Pacific tropical cyclone activity might send small long-period swells towards east-facing shores, potentially spicing up surf heights from tomorrow on. Yet, the NWS does couch this possibility with "low confidence," suggesting that any increase in surf might merely tease the Hawaiian surf scene rather than defining it.