Sebastian Inlet to Jupiter Inlet out 20nm Marine Forecast
| Rest Of Today...North Winds Near 20 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. Wave Detail: North 6 Feet At 7 Seconds. Choppy On The Intracoastal Waters. A Slight Chance Of Showers This Morning, Then A Chance Of Showers This Afternoon. |
| Tonight...North Winds 15 To 20 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: North 5 Feet At 7 Seconds. Choppy On The Intracoastal Waters. |
| Wednesday...Northeast Winds 15 To 20 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: North 5 Feet At 7 Seconds. Choppy On The Intracoastal Waters. A Slight Chance Of Showers. |
| Wednesday Night...North Winds 15 To 20 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: North 5 Feet At 7 Seconds And South 1 Foot At 4 Seconds. Choppy On The Intracoastal Waters. A Slight Chance Of Showers. |
| Thursday...North Winds 15 To 20 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: North 5 Feet At 7 Seconds. Choppy On The Intracoastal Waters. A Slight Chance Of Showers In The Morning, Then A Chance Of Showers In The Afternoon. |
| Thursday Night...North Winds 15 To 20 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: North 5 Feet At 8 Seconds And South 1 Foot At 4 Seconds. Choppy On The Intracoastal Waters. A Chance Of Showers. |
| Friday...North Winds Around 15 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. A Moderate Chop On The Intracoastal Waters. A Slight Chance Of Showers. |
| Friday Night...North Winds 10 To 15 Knots. Seas 3 To 5 Feet, Occasionally To 6 Feet. A Light Chop On The Intracoastal Waters. |
| Saturday...North Winds 10 To 15 Knots, Becoming Northeast 5 To 10 Knots In The Afternoon. Seas 3 To 5 Feet, Occasionally To 6 Feet. A Moderate Chop On The Intracoastal Waters. |
| Saturday Night...East Winds 5 To 10 Knots, Becoming South After Midnight. Seas 3 To 5 Feet, Occasionally To 6 Feet. Mostly Smooth On The Intracoastal Waters. |
| Area Forecast Discussion National Weather Service Melbourne FL 659am EDT Tuesday Mar 17 2026 Issued at 202am EDT Tuesday Mar 17 2026 -----------Synoptic Overview----------- A sharp upper-level trough over the Great Lakes has pushed a surface cold front down the Florida Peninsula this morning. Unseasonably rich, tropical moisture is being scoured out as cold, dry continental air rushes down the state. Over the next 24 hours, additional polar jet stream energy spanning western Canada will force this upper trough eastward, causing it to become positively tilted as it elongates from New England to the western Gulf. With the upper flow becoming parallel to the boundary, the cold front should stall over the Bahamas. High pressure will pass well north of Florida, arriving over the Mid-Atlantic by early Wednesday. While the cool down is impressive, a limited duration of cold air advection is anticipated before low-level flow reverts back onshore by mid-week. H925 (3 kft) temperatures by this morning are forecast to fall to around +1 deg C over the northern reaches of Central Florida, which is approaching the climatological minima for mid-March. These values recover to around +10 to +12 deg C area-wide by Thursday, which is still below normal but is reflective of the slow moderation that is forecast as flow turns onshore. 16/12Z cluster analysis remains in decent agreement through the remainder of the work week. Downstream of the exceptionally stout heat ridge over the Desert Southwest, the lingering trough over Florida should slowly migrate eastward, its axis far enough east to inhibit substantial moisture advection. Sub-1" PWATs (Precipitable Waters) are likely to reach the Treasure Coast by this evening, and guidance keeps near-to-below normal moisture in place through at least Saturday. Through the weekend, around 80% of the members support a de-amplified northern stream, preventing any fronts from reaching the Sunshine State. Surface high pressure should reside close by. Consequently, slow and steady warm advection should persist, pushing H85 (5 kft) temperatures closer to normal by the weekend. Confidence decreases in about a week as members diverge, with some supporting a trough developing over New England. A dissipating front could approach the state by next Monday or Tuesday, followed by fresh onshore flow as strong high pressure builds back over the Mid-Atlantic states. Aside from the below normal temperatures early on, this pattern is unlikely to bring significant weather impacts to Central Florida over the next week. -------Sensible Weather & Impacts------- Today - Wednesday... The big story today will be the much colder air. By daybreak, locations north of a Melbourne to Okeechobee line should fall into the 40s, with low 40s north of Orlando. There is at least a 50% chance of wind chills dipping into the mid to upper 30s this morning, north of Kissimmee to Titusville. You'll want an extra layer or two through the day, as persistent north breezes and intervals of cloudiness limit our ability to shake off the chilly temps. Highs should only reach the upper 50s to mid 60s, at least 20 to 25 degrees colder than yesterday. In fact, some locations may tie or set their coldest recorded high temperature for today's date. There should be a break from any showers this morning. However, favorable positioning of the upper jet over Florida may interact with lingering moisture south of Orlando to produce a few more showers this afternoon and evening (20-30%). These should decrease later tonight, with the slight chance for showers focused along the Treasure Coast on Wednesday. It will remain much cooler than normal over the interior and northern areas tonight, with widespread low-mid 40s except for the immediate Space/Treasure Coasts (upper 40s-low 50s). Wind chills may once again fall into the upper 30s on Wednesday morning over the interior and Volusia County. Expect more sunshine on Wednesday afternoon, boosting highs into the mid 60s to the low 70s as northeast winds increase. Beach-goers should stay out of the Atlantic today due to numerous rip currents and a southward-flowing longshore current. The rip current risk will likely remain high into Wednesday. Thursday - Friday... Breezy onshore flow persists late in the week, with some indication that somewhat greater moisture may skirt the coastline. This may bring occasional cloud cover or a shower to the coast (20-30%), but much dry time is expected. Temperature moderation continues, but readings should still be below normal (70s in most spots). Weekend - Early Next Week High pressure drifts southward, settling over Florida through the weekend. Any major disturbances look to stay well north of here, so one should expect pleasant conditions with plentiful sunshine. Low to mid 80s are forecast through at least Monday, except for some upper 70s at the coast on Saturday. A weak front or reinforcing surface high to the north is likely to increase winds off the Atlantic beginning next Tuesday. Temperatures may cool a bit in response, with perhaps a few rain showers accompanying the wind surge. Marine Issued at 202am EDT Tuesday Mar 17 2026 Hazardous conditions continue this morning due to strong northwest breezes and building seas. A cold front exits toward the Bahamas today before becoming stationary on Wednesday. High pressure over the Plains will quickly migrate toward the east, extending from the Deep South to the Mid-Atlantic states by Thursday. Winds will veer onshore on Wednesday, remaining moderate to fresh at times through at least Thursday. High pressure then settles over Florida this weekend. Seas 4-5 ft nearshore building to 6-9 ft in the Gulf Stream today. On Wednesday, seas around 4 ft nearshore, up to 6 ft in the Gulf Stream. Fresh onshore breezes may cause 7 ft seas to return to the Gulf Stream on Thursday. Seas remain 4-6 ft even into Friday. Fire Weather Issued at 202am EDT Tuesday Mar 17 2026 Brisk, drier air punches southward into Central Florida today as a cold front moves out to sea. With north winds around 8-12 mph, min RH values fall to 30-35% along and northwest of I-4 this afternoon. Fire-sensitive conditions are expected over this area. This general vicinity will also have the lowest RH values on Wednesday afternoon, 35-40%. Winds on Wednesday turn northeasterly, 8-12 mph. Some RH recovery is forecast on Thursday. As temperatures turn warmer, RH minima will trend lower from Friday through the weekend, ranging from 30 to 40% over much of the interior. NOAA Melbourne FL Office: Watches - Warnings - Advisories FL...None. AM...Small Craft Advisory until 1pm EDT this afternoon for AMZ550- 552. Small Craft Advisory until 10pm EDT this evening for AMZ555-570. Small Craft Advisory until 2am EDT Wednesday for AMZ572-575. |
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