Climbing Forecast › New Jersey › Delaware Water Gap (Mt Tammany)

NEW JERSEY · QUARTZITE

Delaware Water Gap (Mt Tammany) climbing conditions

Good — dry and climbable

Right now

Temp54°F
Wind2 mph
Gusts4 mph
Humidity97.5%
Rain 48hdry
Last rainNone recent

Assessment

No recent rain
Good friction temperature range for quartzite
High humidity (97.5%) — quartzite friction compromised, particularly for bouldering

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Monday 5 October
Good
Temp59°F
Raindry
Wind9 mph
Gusts4 mph
Humidity77%
No recent rain
  • Quartzite holds friction well when dry
Time °F Rain Wind (mph) Gust Hum
06:00 52° dry 3 — 99.1%
07:00 50° dry 4 — 99.3%
08:00 50° dry 5 — 99.3%
09:00 51° dry 6 — 98.2%
10:00 53° dry 8 — 97.8%
11:00 54° dry 7 — 96%
12:00 56° dry 8 — 93%
13:00 60° dry 8 — 83.5%
14:00 63° dry 9 — 69.6%
15:00 65° dry 11 — 57.1%
16:00 65° dry 10 — 41.6%
17:00 67° dry 15 — 35.4%
18:00 65° dry 15 — 40.1%
19:00 64° dry 14 — 42.5%
20:00 64° dry 13 — 41.1%
21:00 63° dry 12 — 41.3%
Tue Tuesday 6 October
Good
Temp48°F
Raindry
Wind7 mph
Gusts—
Humidity63%
No recent rain
  • Quartzite holds friction well when dry
Time °F Rain Wind (mph) Gust Hum
06:00 46° dry 8 — 69.7%
07:00 46° dry 8 — 70.1%
08:00 45° dry 8 — 70.8%
09:00 44° dry 8 — 74.1%
10:00 43° dry 7 — 78.7%
11:00 42° dry 7 — 79.1%
12:00 45° dry 6 — 72.7%
13:00 49° dry 6 — 64.2%
14:00 52° dry 8 — 55.7%
15:00 54° dry 7 — 48.2%
16:00 56° dry 7 — 45.9%
17:00 58° dry 6 — 43.6%
18:00 60° dry 6 — 41.3%
19:00 60° dry 6 — 39.8%
20:00 60° dry 7 — 39.7%
21:00 60° dry 6 — 41.4%
Wed Wednesday 7 October
Good
Temp50°F
Raindry
Wind6 mph
Gusts—
Humidity76%
No recent rain
  • Quartzite holds friction well when dry
Time °F Rain Wind (mph) Gust Hum
06:00 41° dry 1 — 96.3%
07:00 42° dry 1 — 94.2%
08:00 42° dry 2 — 91.5%
09:00 42° dry 2 — 92.8%
10:00 41° dry 2 — 95.5%
11:00 41° dry 3 — 97.2%
12:00 44° dry 4 — 89.9%
13:00 50° dry 4 — 77%
14:00 55° dry 6 — 63.7%
15:00 59° dry 8 — 56.3%
16:00 62° dry 10 — 49.7%
17:00 64° dry 10 — 49.3%
18:00 65° dry 10 — 51.3%
Thu Thursday 8 October
Caution
Temp52°F
Raindry
Wind4 mph
Gusts—
Humidity90%
No recent rainHumidity 90% — potential fog
  • Quartzite holds friction well when dry
Time °F Rain Wind (mph) Gust Hum
06:00 50° dry 4 — 94%
12:00 51° dry 4 — 90.2%
18:00 71° dry 7 — 40.8%
Fri Friday 9 October
Caution
Temp48°F
Raindry
Wind4 mph
Gusts—
Humidity85%
No recent rainHumidity 85% — potential fog
  • Quartzite holds friction well when dry
Time °F Rain Wind (mph) Gust Hum
06:00 49° dry 5 — 69.8%
12:00 48° dry 4 — 85%
18:00 67° dry 4 — 33.9%
Sat Saturday 10 October
Good
Temp52°F
Raindry
Wind5 mph
Gusts—
Humidity75%
No recent rain
  • Quartzite holds friction well when dry
Time °F Rain Wind (mph) Gust Hum
06:00 50° dry 5 — 81.5%
12:00 51° dry 5 — 75.1%
18:00 69° dry 6 — 33.8%
Sun Sunday 11 October
Good
Temp48°F
Raindry
Wind4 mph
Gusts—
Humidity84%
No recent rain
  • Quartzite holds friction well when dry
Time °F Rain Wind (mph) Gust Hum
06:00 47° dry 4 — 89.2%
12:00 48° dry 4 — 83.8%
18:00 69° dry 4 — 37.9%
Mon Monday 12 October
Caution
Temp50°F
Raindry
Wind3 mph
Gusts—
Humidity92%
No recent rainHumidity 92% — potential fog
  • Quartzite holds friction well when dry
Time °F Rain Wind (mph) Gust Hum
06:00 50° dry 1 — 89.1%
12:00 49° dry 3 — 92%
18:00 74° dry 4 — 43.8%

About Delaware Water Gap (Mt Tammany)

The Delaware Water Gap's Mount Tammany cliffs are New Jersey's biggest multi-pitch trad venue — Shawangunk Formation metaquartzite (the same Silurian quartz-rich stratum that becomes conglomerate at the Gunks) capping the Kittatinny Ridge where the Delaware River cuts through. Mountain Project calls Tammany "bigger and more spectacular than Minsi" (the PA-side cliff across the river). The rock is quartz-cemented, well-bedded, and durable, giving predominantly moderate trad routes. Mountain Project's top-ticked classics are The Rib (5.3, two pitches), Triumvirate (5.4, two pitches), Black Wall Route (5.7, three pitches), Double Overhang (5.8, two pitches), and Corkscrew (5.8+) on the Great Arch. Approach is a steep 40-minute hike from the Dunnfield Creek parking lot inside Delaware Water Gap NRA. National Park Service land — free, no permit or fee; a strict ground-up ethic applies (no sport bolting; power drills and new hardware are illegal on federal land) and helmets are required. Peregrine falcon closures at DEWA are on Mount MINSI (PA side, Point of Gap parking lot to Arrow Island) — Mount Tammany itself has NO active peregrine ban. April–June and September–November are prime.

Region
New Jersey
Rock type
Quartzite
Aspect
west-facing
Altitude
1509 ft
Exposure
high
Seepage
medium